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EnviroAtlas

EnviroAtlas Dynamic Data Matrix

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Data Layer Name

Description

Clean Air

Clean & Plentiful Water

Natural Hazard Mitigation

Climate Stabilization

Recreation, Culture, & Aesthetics

Food, Fuel, & Materials

Biodiversity Conservation

Acres of crops that have no nearby pollinator habitat This map layer depicts the total acres of agricultural crops within a subwatershed (12-digit HUC) that require or would benefit from the presence of pollinators, but are without any nearby supporting habitat.            
Acres of land enrolled in CRP This map portrays the acres of land within each subwatershed (12-digit HUC) that are enrolled in the US Department of Agriculture's Conservation Reserve Program (CRP). The CRP is a program administered by the Farm Service Agency; farmers in the program receive annual payments and establishment cost share to remove environmentally sensitive land from crop production and instead plant perennial species that provide environmental benefits.        
Agricultural water use (million gallons/day) This map estimates the millions of gallons of water used daily for agricultural irrigation for each subwatershed (HUC-12) in the contiguous United States. Estimates include self-supplied surface and groundwater, as well as water supplied by irrigation water providers, which may include governments, companies, or other organizations.            
Annual oxidized nitrogen dry deposition (kg/ha) This map estimates the annual dry deposition of oxidized nitrogen within each subwatershed (12-digit HUC) in kilograms per hectare. Dry deposition occurs when particles or gases attach to surfaces such as dust or smoke and fall to the earth's surface.        
Annual oxidized nitrogen wet deposition (kg/ha) This map estimates the annual wet deposition of oxidized nitrogen within each subwatershed (12-digit HUC) in kilograms per hectare. Wet deposition occurs when rain, snow, or fog carry nitrogen to the earth’s surface.        
Annual reduced nitrogen dry deposition (kg/ha) This map estimates the annual dry deposition of reduced nitrogen within each subwatershed (12-digit HUC) in kilograms per hectare. Dry deposition occurs when particles or gases attach to surfaces such as dust or smoke and fall to the earth's surface.        
Annual reduced nitrogen wet deposition (kg/ha) This map estimates the annual wet deposition of reduced nitrogen within each subwatershed (12-digit HUC) in kilograms per hectare. Wet deposition occurs when rain, snow, or fog carry nitrogen to the earth’s surface.        
Annual sulfur dry deposition (kg/ha) This map estimates the annual dry deposition of sulfur within each subwatershed (12-digit HUC) in kilograms per hectare. Dry deposition occurs when particles or gases attach to surfaces such as dust or smoke and fall to the earth's surface.        
Annual sulfur wet deposition (kg/ha) This map estimates the annual wet deposition of sulfur within each subwatershed (12-digit HUC) in kilograms per hectare. Wet deposition occurs when rain, snow, or fog carry sulfur to the earth’s surface.        
Area of solar energy (km2) This map estimates the square kilometers of area within each subwatershed (12-digit HUC) that offers the potential for harvesting solar energy for 2009. This map does not take into account land use or ownership.            
Average annual daily potential solar energy (kWh/m2/day) This map estimates the average daily potential kilowatt hours of solar energy that could be harvested per square meter within each subwatershed (12-digit HUC) for 2009. This calculation is based on environmental factors and does not take into account land ownership or viability of installing solar harvesting systems.            
Average annual daily potential wind energy (kWh/m2/day) This map estimates the average daily potential kilowatt hours of wind energy that could be harvested per square meter within each subwatershed (12-digit HUC), based on data from 2001-2012. This calculation is based on environmental factors and does not take into account land ownership or viability of installing wind harvesting systems.            
Average annual precipitation (inches/yr) This map estimates the average number of inches of precipitation that fall within a subwatershed (12-digit HUC) each year. Precipitation includes snow and rain accumulation.    
Big game hunting recreation demand This map illustrates the number of day trips per year demanded for big game hunting by individuals over the age of 18 within each subwatershed (12-digit HUC) for 2010-2011.            
Bird watching recreation demand This map illustrates the number of day trips per year demanded for bird watching by individuals over the age of 18 within each subwatershed (12-digit HUC) for 2010-2011.            
Carbon storage by tree biomass (kg/m2) This map estimates the kilograms of dry carbon stored per square meter of above ground biomass of trees and forests in each subwatershed (12-digit HUC).            
Carbon storage by tree root biomass (kg/m2) This map estimates the kilograms of dry carbon stored per square meter in below ground biomass in each subwatershed (12-digit HUC). Biomass below ground includes tree root biomass and soils.            
Cotton yields (thousand tons/yr) This map depicts the thousands of tons of cotton that are grown annually within each subwatershed (12-digit HUC).            
Cultivated biological nitrogen fixation (kg N/ha/yr) This map depicts the mean rate of biological nitrogen fixation from the cultivation of crops within each subwatershed (12-digit HUC) in kg N/ha/yr.           
Domestic water use (million gallons/day) This map estimates the millions of gallons of water used daily for domestic purposes in each subwatershed (HUC-12). For the purposes of this map, domestic or residential water use includes all indoor and outdoor uses, such as for drinking, bathing, cleaning, landscaping, and pools for primary residences.            
Freshwater fishing recreation demand This map illustrates the number of day trips per year demanded for freshwater fishing by individuals over the age of 18 within each subwatershed (12-digit HUC) for 2010-2011.            
Fruit yields (thousand tons/yr) This map depicts the thousands of tons of fruit crops that are grown annually within each subwatershed (12-digit HUC).            
Grain yields (thousand tons/yr) This map depicts the thousands of tons of major grain crops that are grown annually within each subwatershed (12-digit HUC).            
Hectares of cotton crops This map depicts the total hectares managed for cotton crops annually within each subwatershed (12-digit HUC).            
Hectares of fruit crops This map depicts the total hectares managed for fruit crops annually within each subwatershed (12-digit HUC).            
Hectares of grain crops This map depicts the total hectares managed for major grain crops annually within each subwatershed (12-digit HUC).            
Hectares of vegetable crops This map depicts the total hectares managed for vegetable crops annually within each subwatershed (12-digit HUC).            
Industrial water use (million gallons/day) This map estimates the millions of gallons of water used daily for industrial processes in each subwatershed (HUC-12). Estimates include self-supplied surface and groundwater, as well as water supplied by water providers, which may include governments, companies, or other organizations.            
Manure application (kg N/ha/yr) This map depicts the mean rate of manure application to agricultural lands from confined animal feeding operations within each subwatershed (12-digit HUC) in kg N/ha/yr.         
Maximum amphibian species richness This map models the maximum number of amphibian species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed.            
Maximum big game species richness This map models the maximum number of big game species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed.          
Maximum bird species richness This map models the maximum number of bird species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the Conterminous US for 2015. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed..          
Maximum fur bearer species richness This map models the maximum number of fur bearer species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed.          
Maximum mammal species richness This map models the maximum number of mammal species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed.            
Maximum modeled Partners in Flight Watch List bird species This map models the maximum number of bird species listed by Partners in Flight in their Watch List that are likely to be present in any single location within a subwatershed (12-digit HUC) in the Conterminous US for 2015. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed.          
Maximum modeled State of the Birds species of conservation concern This map models the maximum number of bird species listed as species of conservation concern in the 2011 State of the Birds report (https://www.stateofthebirds.org/2011) that are likely to be present in any single location within a subwatershed (12-digit HUC) in the Conterminous US for 2015. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed.          
Maximum modeled threatened and endangered vertebrate species This map models the maximum number of threatened and endangered species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed.          
Maximum number of bird species vulnerable to range loss due to climate change by 2050 This map models the maximum number of Audubon Climate Endangered bird species (https://climate.audubon.org/) that are likely to be present in any single location within a subwatershed (12-digit HUC) in the Conterminous US for 2015. These are bird species vulnerable to a loss of 50% or more of current range due to climate change by 2050. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed.          
Maximum number of bird species vulnerable to range loss due to climate change by 2080 This map models the maximum number of Audubon Climate Threatened bird species (https://climate.audubon.org/) that are likely to be present in any single location within a subwatershed (12-digit HUC) in the Conterminous US for 2015. These are bird species vulnerable to a loss of 50% or more of current range due to climate change by 2080. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed.          
Maximum reptile species richness This map models the maximum number of reptile species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the Conterminous US for 2015. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed.            
Maximum small game species richness This map models the maximum number of small game species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed.          
Maximum total harvestable species richness This map models the maximum number of harvestable species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed.          
Maximum total vertebrate species richness This map models the maximum number of vertebrate species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed.          
Maximum waterfowl species richness This map models the maximum number of waterfowl species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The maximum number does not represent the potential richness for the entire watershed.          
Mean amphibian species richness This map models the average number of amphibian species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations.            
Mean big game species richness This map models the average number of big game species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations.          
Mean bird species richness This map models the average number of bird species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the Conterminous US for 2015. This map is based on habitat models, not wildlife observations.          
Mean fur bearer species richness This map models the average number of fur bearer species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations.          
Mean mammal species richness This map models the average number of mammal species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations.            
Mean modeled Partners in Flight Watch List bird species This map models the mean number of bird species listed by Partners in Flight in their Watch List  that are likely to be present in any single location within a subwatershed (12-digit HUC) in the Conterminous US for 2015. This map is based on habitat models, not wildlife observations.          
Mean modeled State of the Birds species of conservation concern This map models the mean number of bird species listed as species of conservation concern in the 2011 State of the Birds report (https://www.stateofthebirds.org/2011) that are likely to be present in any single location within a subwatershed (12-digit HUC) in the Conterminous US for 2015. This map is based on habitat models, not wildlife observations.          
Mean modeled threatened and endangered vertebrate species This map models the average number of threatened and endangered species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations.          
Mean number of bird species vulnerable to range loss due to climate change by 2050 This map models the average number of Audubon Climate Endangered bird species (https://climate.audubon.org/) that are likely to be present in any single location within a subwatershed (12-digit HUC) in the Conterminous US for 2015. These are bird species vulnerable to a loss of 50% or more of current range due to climate change by 2050. This map is based on habitat models, not wildlife observations.          
Mean number of bird species vulnerable to range loss due to climate change by 2080 This map models the average number of Audubon Climate Threatened bird species (https://climate.audubon.org/) that are likely to be present in any single location within a subwatershed (12-digit HUC) in the Conterminous US for 2015. These are bird species vulnerable to a loss of 50% or more of current range due to climate change by 2080. This map is based on habitat models, not wildlife observations.          
Mean reptile species richness This map models the average number of reptile species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the Conterminous US for 2015. This map is based on habitat models, not wildlife observations.            
Mean small game species richness This map models the average number of small species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations.          
Mean total harvestable species richness This map models the average number of harvestable species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations.          
Mean total vertebrate species richness This map models the average number of vertebrate species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations.          
Mean waterfowl species richness This map models the average number of waterfowl species that are likely to be present in any single location within a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations.          
Migratory bird hunting recreation demand This map illustrates the number of day trips per year demanded for migratory bird hunting by individuals over the age of 18 within each subwatershed (12-digit HUC) for 2010-2011.            
Natural biological nitrogen fixation (kg N/ha/yr) This map depicts mean biological nitrogen fixation in natural and semi-natural ecosystems within each subwatershed (12-digit HUC) in kg N/ha/yr.          
NIB amphibian species richness This map depicts an index value of amphibian species richness for a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC.            
NIB big game species richness This map depicts an index value of big game species richness for a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC.          
NIB bird species richness This map depicts an index value of bird species richness for a subwatershed (12-digit HUC) in the Conterminous US for 2015. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC.          
NIB fur bearer species richness This map depicts an index value of fur bearer species richness for a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC.          
NIB mammal species richness This map depicts an index value of mammal species richness for a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC.            
NIB modeled Partners in Flight Watch List bird species This map depicts an index value of bird species richness for bird species listed by Partners in Flight in their Watch List for a subwatershed (12-digit HUC) in the Conterminous US for 2015. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC. The Bird of Conservatation Concern Normalized Index of Biodiversity (NIB) was calculated by dividing the mean species richness value of each HUC by the maximum value for the study area.          
NIB modeled State of the Birds species of conservation concern This map depicts an index value of bird species richness for Birds of Conservatation Concern for a subwatershed (12-digit HUC) in the Conterminous US for 2015. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC. The Bird of Conservatation Concern Normalized Index of Biodiversity (NIB) was calculated by dividing the mean species richness value of each HUC by the maximum value for the study area.          
NIB modeled threatened and endangered vertebrate species This map depicts an index value of threatened and endangered species richness for a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC.          
NIB number of bird species vulnerable to range loss due to climate change by 2050 This map depicts an index value of Audubon Climate Endangered bird species (https://climate.audubon.org/) richness for a subwatershed (12-digit HUC) in the Conterminous US for 2015. These are bird species vulnerable to a loss of 50% or more of current range due to climate change by 2050. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC.          
NIB number of bird species vulnerable to range loss due to climate change by 2080 This map depicts an index value of Audubon Climate Threatened bird species (https://climate.audubon.org/) richness for a subwatershed (12-digit HUC) in the Conterminous US for 2015. These are bird species vulnerable to a loss of 50% or more of current range due to climate change by 2080. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC.          
NIB reptile species richness This map depicts an index value of reptile species richness for a subwatershed (12-digit HUC) in the Conterminous US for 2015. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC.            
NIB small game species richness This map depicts an index value of small game species richness for a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC.          
NIB total harvestable species richness This map depicts an index value of harvestable species richness for a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC.          
NIB total vertebrate species richness This map depicts an index value of vertebrate species richness for a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC.          
NIB waterfowl species richness This map depicts an index value of waterfowl species richness for a subwatershed (12-digit HUC) in the southeast and southwest. This map is based on habitat models, not wildlife observations. The index value is based on average values determined for each HUC.          
Number of at-risk aquatic animal species This map illustrates the total number of animal species associated with aquatic habitat that are listed as G1, G2, or in the federal endangered species program that may reside within each subwatershed (12-digit HUC). G1 and G2 denote Global Conservation Ranks classified by NatureServe.        
Number of at-risk aquatic plant species This map illustrates the total number of plant species associated with aquatic habitat that are listed as G1, G2, or in the federal endangered species program that may reside within each subwatershed (12-digit HUC). G1 and G2 denote Global Conservation Ranks classified by NatureServe.        
Number of at-risk terrestrial animal species This map illustrates the total number of animal species associated with terrestrial habitat that are listed as G1, G2, or in the federal endangered species program that may reside within each subwatershed (12-digit HUC). G1 and G2 denote Global Conservation Ranks classified by NatureServe. Terrestrial habitat refers to land areas such as forests, grasslands, deserts and rainforests.          
Number of at-risk terrestrial plant species This map illustrates the total number of plant species associated with terrestrial habitat that are listed as G1, G2, or in the federal endangered species program that may reside within each subwatershed (12-digit HUC). G1 and G2 denote Global Conservation Ranks classified by NatureServe. Terrestrial habitat refers to land areas such as forests, grasslands, deserts and rainforests.          
Number of at-risk wetland animal species This map illustrates the total number of animal species associated with wetland habitat that are listed as G1, G2, or in the federal endangered species program that may reside within each subwatershed (12-digit HUC) for 2011. G1 and G2 denote Global Conservation Ranks classified by NatureServe.        
Number of at-risk wetland plant species This map illustrates the total number of plant species associated with wetland habitat that are listed as G1, G2, or in the federal endangered species program that may reside within each subwatershed (12-digit HUC) for 2011. G1 and G2 denote Global Conservation Ranks classified by NatureServe.        
Number of fruit crop types (annually) This map depicts the number of fruit crop types that are grown annually within each subwatershed (12-digit HUC).            
Number of grain crop types (annually) This map depicts the number of major grain crop types that are grown annually within each subwatershed (12-digit HUC).            
Number of high hazard potential dams This map depicts the number of high hazard potential dams within each subwatershed (12-digit HUC). For this map, EnviroAtlas uses the 2009 National Inventory of Dams maintained by the US Army Corps of Engineers.      
Number of historic places This map summarizes the number of federally listed historic districts, sites, buildings, structures, and objects within each census block group.            
Number of vegetable crop types (annually) This map depicts the number of vegetable crop types that are grown annually within each subwatershed (12-digit HUC).            
Percent agriculture on hydric soil This map depicts the percentage of land managed for agriculture that has hydric soils within each subwatershed (12-digit HUC). This includes all land dedicated to the production of crops, but excludes land managed for pasture.        
Percent agriculture in areas of high water accumulation This map estimates the percent of land within a subwatershed (12-digit HUC) that is frequently or periodically wet due to high water accumulation and is managed for agriculture for 2006-2010. This map uses a wetness index of 550 from a compound topographic index (CTI) to determine if the area is considered to be wet.        
Percent cropland This map depicts the percent of land managed as cropland in each subwatershed (12-digit HUC). For this map, EnviroAtlas uses all crop types in the Cropland Data Layer created by the United States Department of Agriculture.  
Percent developed area This map estimates the amount of developed land within each subwatershed (12-digit HUC) for 2011. For the purposes of this map, developed land cover includes a variety of development, such as single family homes, multifamily housing units, retail, commercial, industrial sites, and associated infrastructure. Developed land cover is not confined to city limits.
Percent developed land in areas of high water accumulation This map estimates the percent of land within a subwatershed (12-digit HUC) that is frequently or periodically wet due to high water accumulation and has been developed or urbanized for 2006-2010. This map uses a wetness index of 550 from a compound topographic index (CTI) to determine if the area is considered to be wet. This map includes various types of development such as open spaces, parks, golf courses, single family homes, multifamily housing units, retail, commercial, industrial sites, and associated infrastructure.          
Percent emergent herbaceous wetlands This map depicts the percent of land comprised of emergent herbaceous wetlands in each subwatershed (12-digit HUC). For this map, EnviroAtlas uses the National Land Cover Database and its definition of  emergent herbaceous wetlands.  
Percent forest This map illustrates the percentage of total land within each subwatershed (12-digit HUC) that is covered by trees and forest.
Percent forest and woody wetlands This map illustrates the percentage of total land within each subwatershed (12-digit HUC) that is covered by trees and forest or woody wetlands. EnviroAtlas uses the National Land Cover Database definition of woody wetlands.  
Percent forest and woody wetlands in stream buffer This map layer portrays the percent of land within 30 meters of streams, rivers, and other hydrologically connected waterbodies within each subwatershed (12-digit HUC) that is covered by trees and forests or woody wetlands for 2006. EnviroAtlas uses the 2006 National Land Cover Database definition of woody wetlands.      
Percent forest in areas with high water accumulation This map estimates the percent of land within a subwatershed (12-digit HUC) that is frequently or periodically wet due to high water accumulation and is covered by trees and forests for 2006-2010. This map uses a wetness index of 550 from a compound topographic index (CTI) to determine if the area is considered to be wet.          
Percent forest land in stream buffer This map layer portrays the percent of land within 30 meters of streams, rivers, and other hydrologically connected waterbodies within each subwatershed (12-digit HUC) that is covered by trees and forests for 2006.      
Percent GAP status 1 and 2 This map illustrates the percent of land within a subwatershed (12-digit HUC) that is designated as Status 1 or 2 under the USGS Gap Analysis Program. These lands have permanent protections in place limiting visitation, use, and human impacts. Lands with status 1 have more restrictions in place to minimize disturbance and maintain the land's natural state.          
Percent GAP status 1, 2, and 3 This map illustrates the percent of land within subwatershed (12-digit HUC) that has legally recognized easements for conservation or other protections in place to restrict human use or development. This layer includes both public and private land.          
Percent GAP status 3 This map illustrates the percent of land within a subwatershed (12-digit HUC) that is designated as Status 3 under the USGS Gap Analysis Program. These areas have permanent protection from conversion of natural land cover for the majority of area. Subject to extractive uses of either broad, low-intensity type (e.g.. Logging) or localized intense type (e.g.. Mining). Confers protection to federally listed endangered and threatened species throughout the area.          
Percent impervious area This map illustrates the percent of total land within each subwatershed (12-digit HUC) that is impervious. Impervious surfaces do not allow the penetration of water and include buildings, roads, and sidewalks.
Percent IUCN status IA This map portrays the percentage of land within each subwatershed (12-digit HUC) that has been classified as Status IA by International Union for Conservation of Nature (IUCN). Category IA protected areas seek to protect biodiversity and natural features; human visitation, use, and impacts are strictly controlled.          
Percent IUCN status IB This map portrays the percentage of land within each subwatershed (12-digit HUC) that has been classified as Status IB by International Union for Conservation of Nature (IUCN). Category IB protected areas include large unmodified or slightly modified areas, without permanent or significant human habitation. These lands are protected and managed so as to protect their natural condition.          
Percent IUCN status II This map portrays the percentage of land within each subwatershed (12-digit HUC) that has been classified as Status II by International Union for Conservation of Nature (IUCN). Category II protected areas re large natural or near natural areas set aside to protect large-scale ecological processes, along with the complement of species and ecosystems characteristic of the area, which also provide a foundation for environmentally and culturally compatible, spiritual, scientific, educational, recreational, and visitor opportunities.          
Percent IUCN status III This map portrays the percentage of land within each subwatershed (12-digit HUC) that has been classified as Status III by International Union for Conservation of Nature (IUCN). Category III protected areas are set aside to protect a specific natural monument, which can be a landform, sea mount, submarine cavern, geological feature such as a cave or even a living feature such as an ancient grove. They are generally quite small protected areas and often have high visitor value.          
Percent IUCN status IV This map portrays the percentage of land within each subwatershed (12-digit HUC) that has been classified as Status IV by International Union for Conservation of Nature (IUCN). Category IV areas aim to protect particular species or habitats and management reflects this priority. Many Category IV protected areas will need regular, active interventions to address the requirements of particular species or to maintain habitats, but this is not a requirement of the category.          
Percent IUCN status V This map portrays the percentage of land within each subwatershed (12-digit HUC) that has been classified as Status V by International Union for Conservation of Nature (IUCN). Category V protected areas have distinct character with significant, ecological, biological, cultural and scenic value: and where safeguarding the integrity of this interaction is vital to protecting and sustaining the area and its associated nature conservation and other values.          
Percent IUCN status VI This map portrays the percentage of land within each subwatershed (12-digit HUC) that has been classified as Status VI by International Union for Conservation of Nature (IUCN). Category VI protected areas are generally large, with most of the area in a natural condition, where a proportion is under sustainable natural resource management and where low-level non-industrial use of natural resources compatible with nature conservation is seen as one of the main aims of the area.          
Percent land with any IUCN status This map portrays the percentage of land within each subwatershed (12-digit HUC) that is protected. It includes all lands that have been classified by International Union for Conservation of Nature (IUCN) as protected areas.          
Percent large size patches of natural land cover This map illustrates the percent of land within each subwatershed that is covered by large patches of natural areas for 2006-2010. Large natural areas are greater than 25,000 acres and covered by forests, shrubs, grasslands, barren land, or wetlands. It excludes areas that are covered by agriculture and developed land.          
Percent medium size patches of natural land cover This map illustrates the percent of land within each subwatershed that are covered by medium sized natural areas for 2006-2010. Medium natural areas are less 25,000 acres but greater than 500 acres and are covered by forests, shrubs, grasslands, barren land, or wetlands. It excludes areas that are covered by agriculture and developed land.          
Percent natural land cover This map illustrates the percent of total land within each subwatershed (12-digit HUC) that has natural land cover. Natural land cover includes forests, shrubs, grasslands, barren land, and wetlands; it excludes agriculture and impervious surfaces.  
Percent natural land cover in stream buffer This map layer portrays the percent of naturally covered land within 30 meters of streams, rivers, and other hydrologically connected waterbodies within each subwatershed (12-digit HUC) for 2006. Natural land cover includes forests, shrubs, grasslands, barren land, and wetlands; it excludes agriculture and developed land.      
Percent of stream and shoreline with 15% or more impervious cover within 30 meters Percentage of stream and water body shoreline lengths that had impervious cover greater than or equal to 15% within 30 meters for 2011.      
Percent of stream and shoreline with 5% or more impervious cover within 30 meters Percentage of stream and water body shoreline lengths that had impervious cover greater than or equal to 5% within 30 meters for 2011.      
Percent pasture This map depicts the percent of land managed as pasture in each subwatershed (12-digit HUC). Pasture areas are planted for livestock grazing or the production of seed or hay crops.  
Percent potentially restorable wetlands on agricultural land This map estimates the percent of land within each subwatershed (12-digit HUC) that may be suitable for wetland restoration.      
Percent range in areas with high water accumulation This map estimates the percent of land within a subwatershed (12-digit HUC) that is frequently or periodically wet due to high water accumulation and is covered by range land for 2006-2010. This map uses a wetness index of 550 from a compound topographic index (CTI) to determine if the area is considered to be wet. EnviroAtlas defines range as land dominated by shrubs or herbaceous vegetation.        
Percent rare ecosystem forms This map estimates the percent of land within each subwatershed (12-digit HUC) that could be classified as rare ecosystem forms for 2011. Ecosystem rarity in EnviroAtlas is based on size, shape, and type of ecosystem.          
Percent of rare ecosystem forms protected This map estimates the percent of land within each subwatershed (12-digit HUC) that could be classified as rare ecosystem forms that is protected for 2011. Ecosystem rarity in EnviroAtlas is based on size, shape, and type of ecosystem.          
Percent small size patches of natural land cover This map illustrates the percent of land within each subwatershed that are covered by small patches of natural areas for 2006-2010. Small natural areas are less 500 acres and are covered by forests, shrubs, grasslands, barren land, or wetlands. It excludes areas that are covered by agriculture and developed land.          
Percent wetlands This map depicts the percent of land comprised of woody and emergent herbaceous wetlands in each subwatershed (12-digit HUC). For this map, EnviroAtlas uses the National Land Cover Database and its definitions of woody and emergent herbaceous wetlands.
Percent wetlands in areas with high water accumulation This map estimates the percent of land within a subwatershed (12-digit HUC) that is frequently or periodically wet and is covered by wetlands for 2006-2010. This map uses a wetness index of 550 to determine if the area is considered to be wet. EnviroAtlas uses the National Land Cover Database classification of wetlands.          
Population near roadway with little to no tree buffer This map estimates the total population that lives within 90 meters of a major road with little to no tree buffer. For the purposes of this map, little to no tree buffer means that no area within the 90 meters was classified in the National Land Cover Database as forest.            
Stream density (km/km2) This map estimates the drainage density within each subwatershed (12-digit HUC). The density is equal to the total stream length in kilometers within a subwatershed divided by its total area in square kilometers.        
Stream length (km) This map estimates the total kilometers of streams, rivers, or other linear waterways within each subwatershed (12-digit HUC). It includes both natural and man-made water features, but excludes non-linear waterbodies such as lakes.        
Stream length impaired by mercury (km) This map depicts the total stream length in kilometers within the subwatershed (12-digit HUC) that has been listed as impaired by mercury for 2015-2016.            
Stream length impaired by metals other than mercury (km) This map depicts the total stream length in kilometers within the subwatershed (12-digit HUC) that has been listed as impaired due to the presence of metals other than mercury in the water for 2015-2016.            
Stream length impaired by nuisance species (km) This map depicts the total stream length in kilometers within the subwatershed (12-digit HUC) that has been listed as impaired by algal growth, noxious aquatic plants, and nuisance native or invasive plants, animals, fish, or microbes for 2015-2016.            
Stream length impaired by nutrients (km) This map depicts the total stream length in kilometers within the subwatershed (12-digit HUC) that has been listed as impaired due to the presence of nutrients in the water for 2015-2016.            
Stream length impaired by organic enrichment or oxygen depletion (km) This map depicts the total stream length in kilometers within the subwatershed (12-digit HUC) that has been listed as impaired by excessive organic materials or reduced oxygen for 2015-2016.            
Stream length impaired by pathogens (km) This map depicts the total stream length in kilometers within the subwatershed (12-digit HUC) that has been listed as impaired by microbes, such as bacteria, that can spread disease for 2015-2016.            
Stream length impaired by pesticides (km) This map depicts the total stream length in kilometers within the subwatershed (12-digit HUC) that has been listed as impaired by pesticides, such as herbicide and insecticide for 2015-2016.            
Stream length impaired by pH, acidity, or caustic conditions (km) This map depicts the total stream length in kilometers within the subwatershed (12-digit HUC) that has been listed as impaired due to being too acidic or too alkaline for 2015-2016.            
Stream length impaired by sediment or turbidity (km) This map depicts the total stream length in kilometers within the subwatershed (12-digit HUC) that has been listed as impaired by sediment or turbidity for 2015-2016.            
Stream length impaired for temperature (km) This map depicts the total stream length in kilometers within the subwatershed (12-digit HUC) that has been listed as impaired for having higher than average temperature for 2015-2016.            
Stream length with any other impairment (km) This map depicts the total stream length in kilometers within the subwatershed (12-digit HUC) that has been listed as impaired due to any other cause, including flow alterations, habitat alterations, ammonia, biotoxins, chlorine, dioxins, oil and grease, PCBs, radiation, salinity, toxic substances, trash, taste, color, or odor for 2015-2016.            
Stream length with impaired biota (km) This map depicts the total stream length in kilometers within the subwatershed (12-digit HUC) that has been listed as impaired for biota. Biota or biological impairment is an indication of water quality and not necessarily the source of impairment.            
Synthetic nitrogen fertilizer application (kg N/ha/yr) This map depicts the mean rate of synthetic nitrogen fertilizer application to agricultural lands within each subwatershed (12-digit HUC) in kg N/ha/yr.        
Total annual nitrogen deposition (kg/ha) This map estimates the total annual deposition of nitrogen within each subwatershed (12-digit HUC) in kilograms per hectare. This map includes both dry and wet deposition of oxidized and reduced nitrogen.      
Total annual oxidized nitrogen deposition (kg/ha) This map estimates the annual deposition of oxidized nitrogen within each subwatershed (12-digit HUC) in kilograms per hectare. This map includes both dry and wet deposition of oxidized nitrogen.        
Total annual reduced nitrogen deposition (kg/ha) This map estimates the annual deposition of reduced nitrogen within each subwatershed (12-digit HUC) in kilograms per hectare. This map includes both dry and wet deposition of reduced nitrogen.        
Total annual sulfur deposition (kg/ha) This map estimates the annual deposition of sulfur within each subwatershed (12-digit HUC) in kilograms per hectare. This map includes both dry and wet deposition of sulfur.      
Total number of at-risk aquatic species This map illustrates the total number of species associated with aquatic habitat that are listed as G1, G2, or in the federal endangered species program that may reside within each subwatershed (12-digit HUC).        
Total number of at-risk terrestrial species This map illustrates the total number of species associated with terrestrial habitat that are listed as G1, G2, or in the federal endangered species program that may reside within each subwatershed (12-digit HUC). G1 and G2 denote Global Conservation Ranks classified by NatureServe. Terrestrial habitat refers to land areas such as forests, grasslands, deserts and rainforests.          
Total number of at-risk wetland species This map illustrates the total number of species associated with wetland habitat that are listed as G1, G2, or in the federal endangered species program that may reside within each subwatershed (12-digit HUC). G1 and G2 denote Global Conservation Ranks classified by NatureServe.        
Value of cotton crops (dollars/yr) This map depicts annual sales in dollars for cotton produced within each subwatershed (12-digit HUC).            
Value of grain crops (dollars/yr) This map depicts annual sales in dollars for major grain crops produced within each subwatershed (12-digit HUC).            
Vegetable yields (thousand tons/yr) This map depicts the thousands of tons of vegetable crops that are grown annually within each subwatershed (12-digit HUC).            
Water supply from NID reservoirs (million gallons) This map estimates the millions of gallons of surface water in each subwatershed (12-digit HUC) that is contained in the 2009 National Inventory of Dams reservoirs and/or behind dams. This map only estimates volume and does not take into account water rights, designated uses, or previous appropriations.          
Waterbody area (km2) This map estimates the total square kilometers of lakes, ponds, reservoirs, estuaries, playas, swamps, and marshes within each subwatershed (12-digit HUC).        
Mean rental rate per acre for farm land, 2008-2016 Irrigated Mean rental rate for irrigated land on record by county, measured in $/acre for approximately 2008-2016.            
Mean rental rate per acre for farm land, 2008-2016 Non-irrigated Mean rental rate for non-irrigated land on record by county, measured in $/acre for approximately 2008-2016.            
Mean rental rate per acre for farm land, 2008-2016 Pasture Mean rental rate for pastureland on record by county, measured in $/acre for approximately 2008-2016.            
Average width of stream buffers downstream from agriculture The average width in meters of buffers that are contiguous to the stream and are intersected by agricultural flow paths. This metric does not include any riparian areas that do not also contain agriculture upslope.        
Percent pasture on slopes >= 3% Percentage of land area within each subwatershed (12-digit HUC) that is classified as pasture on areas with slopes greater than or equal to three percent          
Percent pasture on slopes >= 9% Percentage of land area within each subwatershed (12-digit HUC) that is classified as pasture on areas with slopes greater than or equal to nine percent.          
Percent cropland on slopes >= 3% Percentage of land area within each subwatershed (12-digit HUC) that is classified as cropland on areas with slopes greater than or equal to three percent.          
Percent cropland on slopes >= 9% Percentage of land area within each subwatershed (12-digit HUC) that is classified as cropland on areas with slopes greater than or equal to nine percent.          
Candidate Ecological Restoration Areas per square kilometer This map depicts the number of Candidate Ecological Restoration Areas (CERAs) per square kilometer. CERAs are areas that could be restored to connect large vegetated areas. They were identified using morphological spatial pattern analysis.          
Candidate Ecological Restoration Areas These polygons represent candidate areas for ecological restoration, based on potential to improve connectivity between naturally vegetated areas.          
Percent of agriculture that is buffered Buffered agriculture as a percentage of total agriculture in each 12-digit HUC.          
Net agricultural phosphorus balance (kg P/ha/yr) This map estimates the mean phosphorus (P) balance between P inputs on croplands from inorganic fertilizer and manure, and removal of P by crops in kilograms P per hectare per year within each subwatershed (12-digit HUC) for 2012.          
Crop phosphorus removal (kg P/ha/yr) This map estimates the mean crop phosphorus (P) removal from croplands in kilograms P per hectare per year within each subwatershed (12-digit HUC) for 2012.          
Percent nonbuffered agriculture Nonbuffered agriculture as a percentage of total land area in the HUC12          
Phosphorus fertilizer application (kg P/ha/yr) This map estimates the application rate of inorganic phosphorus (P) fertilizer on agricultural land in kilograms P per hectare per year within each subwatershed (12-digit HUC) for 2012.        
Phosphorus application as manure (kg P/ha/yr) This map estimates the application rate of phosphorus (P) as manure on croplands in kilograms P per hectare per year within each subwatershed (12-digit HUC) for 2012.        
Dissolved nutrients in surface runoff from agricultural fields (tons) Nitrogen This map provides modeled estimates of the movement (flux) of nitrogen dissolved in surface runoff at the outer edges of all agricultural fields within each subwatershed (12-digit HUC) in metric tons of N for 2002. It includes nitrogen from fertilizer application and atmospheric deposition.        
Dissolved nutrients in surface runoff from agricultural fields (tons) Phosphorus This map provides modeled estimates of the movement (flux) of phosphorus dissolved in surface runoff at the outer edges of all agricultural fields within each subwatershed (12-digit HUC) in metric tons of P for 2002. It includes phosphorus from fertilizer application and atmospheric deposition.        
Dissolved nitrogen in non-tile drain subsurface flow from agricultural fields (tons) This map provides modeled estimates of the movement (flux) of nitrogen dissolved in sub-surface (lateral) flow at the outer edges of non-tile drained agricultural fields within each subwatershed (12-digit HUC) in metric tons of N for 2002. It includes nitogen from fertilizer application and atmospheric deposition.        
Dissolved nutrients in tile drain subsurface flow from agricultural fields (tons) Nitrogen This map provides modeled estimates of the movement (flux) of nitrogen dissolved in sub-surface (lateral) flow at the outer edges of tile drained agricultural fields within each subwatershed (12-digit HUC) in metric tons of N for 2002. It includes nitrogen from fertilizer application and atmospheric deposition.        
Dissolved nutrients in tile drain subsurface flow from agricultural fields (tons) Phosphorus This map provides modeled estimates of the movement (flux) of phosphorus dissolved in sub-surface (lateral) flow at the outer edges of tile-drained agricultural fields within each subwatershed (12-digit HUC) in metric tons of P for 2002. It includes phosphorus from fertilizer application and atmospheric deposition.        
Nutrients attached to eroding surface soil from agricultural fields (tons) Nitrogen This map provides modeled estimates of the movement (flux) of nitrogen attached to soil particles eroding from the surface of the agricultural fields within each subwatershed (12-digit HUC) in metric tons of N for 2002. It includes nitrogen from fertilizer application and atmospheric deposition.        
Nutrients attached to eroding surface soil from agricultural fields (tons) Phosphorus This map provides modeled estimates of the movement (flux) of phosphorus attached to soil particles eroding from the surface of the agricultural fields within each subwatershed (12-digit HUC) in metric tons of P for 2002. It includes phosphorus from fertilizer application and atmospheric deposition.        
Dissolved nutrients in leachate from agricultural fields (tons) Nitrogen This map provides modeled estimates of nitrogen leachate, i.e., mass of nitrogen dissolved in percolate moving downward out of the soil layer underlying agricultural fields within each subwatershed (12-digit HUC) in metric tons of N for 2002. It does not necessarily reflect the amount of nitrogen that actually enters an underlying groundwater reservoir.            
Dissolved nutrients in leachate from agricultural fields (tons) Phosphorus This map provides modeled estimates of phosphorus leachate, i.e., mass of phosphorus dissolved in percolate moving downward out of the soil layer underlying agricultural fields within each subwatershed (12-digit HUC) in metric tons of P for 2002. It does not necessarily reflect the amount of nitrogen that actually enters an underlying groundwater reservoir.            
Subsurface water flow through agricultural tile drainage systems (mm) This map provides modeled estimates of sub-surface (lateral) flow at the outer edges of tile drained agricultural fields within each subwatershed (12-digit HUC) in millimeters (mm) of water for 2002.            
Non-tile drainage system subsurface water flow from agricultural lands (mm) This map provides modeled estimates of sub-surface (lateral) flow at the outer edges of non-tile drained agricultural fields within each subwatershed (12-digit HUC) in millimeters (mm) of water for 2002.            
Percolation from agricultural lands (mm) This map provides modeled estimates of percolation (vertical) flow from the bottom of the soil layer underlying agricultural fields within each subwatershed (12-digit HUC) in millimeters (mm) of water for 2002. It does not necessarily reflect the amount of water that actually enters an underlying groundwater reservoir.            
Surface runoff from agricultural land (mm) This map provides modeled estimates of surface runoff at the outer edges of all agricultural fields within each subwatershed (12-digit HUC) in millimeters (mm) of water for 2002.            
Surface sediment erosion from agricultural lands (tons) This map provides modeled estimates of the movement (flux) of soil particles eroding from the surface of the agricultural fields within each subwatershed (12-digit HUC) in metric tons of soil for 2002.            
Thermoelectric water use (million gallons/day) Withdrawal This map estimates the millions of gallons of water withdrawn daily for thermoelectric power generation in each subwatershed (HUC-12) for 2016. Thermoelectric power creates electricity through steam powered turbines. This map is based on total water withdrawn, and it includes water that is returned to the watershed after use.            
Thermoelectric water use (million gallons/day) Consumption This map estimates the millions of gallons of water consumed daily for thermoelectric power generation in each subwatershed (HUC-12) for 2016. Thermoelectric power creates electricity through steam powered turbines. This map is based on water withdrawn that is consumed without being returned to the watershed.            
Industrial water use (million gallons/day) This map estimates the millions of gallons of water used daily for industrial processes in each subwatershed (HUC-12) for 2010. For the purposes of this metric, industrial water use includes chemical, food, paper, wood, and metal production. The industrial water is for self-supplied only such as by private wells or reservoirs. Sources include either surface water or groundwater.            

Data layer name

Description

Clean Air

Clean & Plentiful Water

Natural Hazard Mitigation

Climate Stabilization

Recreation, Culture, & Aesthetics

Food, Fuel, & Materials

Biodiversity Conservation

Acute respiratory symptoms avoided due to ozone removed by tree cover (cases/yr) This map estimates the annual number of acute respiratory symptom cases that may be avoided due to total ozone removed by trees in each census block group.            
Acute respiratory symptoms avoided due to particulate matter [PM2.5] removed by tree cover (cases/yr) This map estimates the annual number of acute respiratory symptom cases that may be avoided due to total PM2.5 removed by trees in each census block group.            
Agricultural land per capita (m2/person) This map estimates the square meters of land per person that is managed for agriculture within each census block group.            
Asthma exacerbation avoided due to nitrogen dioxide removed by tree cover (cases/yr) This map estimates the annual number of asthma exacerbation cases that may be avoided due to total nitrogen dioxide removed by trees in each census block group.            
Asthma exacerbation avoided due to sulfur dioxide removed by tree cover (cases/yr) This map estimates the annual number of asthma exacerbation cases that may be avoided due to total sulfur dioxide removed by trees in each census block group.            
Average reduction in daytime ambient temperature (Celsius) This map estimates the average reduction in the ambient temperature at 2 pm on a hot summer day due to the cooling properties of tree cover in each census block group.          
Average reduction in nighttime ambient temperature (Celsius) This map estimates the average reduction in the ambient temperature at night following a hot summer day due to the cooling properties of tree cover in each census block group.          
Carbon monoxide removed annually by tree cover (kg/yr) This map estimates the total kilograms of ambient carbon monoxide removed annually by trees in each census block group.          
Daily domestic water use (x1000 gal/day) This map estimates the total water used daily for domestic purposes in each census block group. For the purposes of this map, domestic or residential water use includes all indoor and outdoor uses, such as for drinking, bathing, cleaning, landscaping, and pools for primary residences.            
Day care centers with < 25 percent green space in viewshed This map summarizes the number of day care centers in each census block group that have less than 25 percent of “green space” in the area within 100 meters of the building.  Green space may include trees, lawns and gardens, crop land, and forested wetlands.            
Estimated percent of tree cover within 26m of a road edge This map estimates the percent tree cover within 26 meters of a busy road edge at any given point throughout the community. A “busy” roadway in  EnviroAtlas is defined to include interstates, arterial roads, and collector roads. It does not include local or neighborhood roads, though some of these roads may also experience consistent and heavy traffic.        
Estimated tree cover in 15m stream and lake buffer (percent) This map estimates the percent tree cover within 15 meters of hydrologically connected non-coastal waters.  It is not summarized by census block group.      
Estimated tree cover in 50m stream and lake buffer (percent) This map estimates the percent tree cover within 50 meters of hydrologically connected non-coastal waters.  It is not summarized by census block group.      
Estimated vegetated cover in 15m stream and lake buffer (percent) This map estimates the percent vegetated cover within 15 meters of hydrologically connected non-coastal waters.  It is not summarized by census block group.      
Estimated vegetated cover in 50m stream and lake buffer (percent) This map estimates the percent vegetated cover within 50 meters of hydrologically connected non-coastal waters. It is not summarized by census block group.      
Estimated walking distance to a park entrance (meters) This map estimates the total meters, or walking distance, from each park entrance.            
Green space per capita (m2/person) This map illustrates the square meters of total land per person within each census block group that is covered by vegetation, or “green space.”  Green space may include trees, lawns and gardens, crop land, and forested wetlands.          
Impervious area per capita (m2/person) This map estimates the square meters of total land per person within each census block group that is covered by impervious surfaces. Impervious surfaces do not allow the penetration of water and include buildings, roads, and sidewalks.      
K-12 schools with < 25 percent green space in viewshed This map summarizes the number of K-12 schools in each census block group that have less than 25 percent of “green space” in the area within 100 meters of the building. Green space may include trees, lawns and gardens, crop land, and forested wetlands.            
Nitrogen dioxide removed annually by tree cover (kg/yr) This map estimates the total kilograms of nitrogen dioxide removed annually by trees in each census block group.        
Number of historic places This map summarizes the number of federally listed historic districts, sites, buildings, structures, and objects within each census block group.            
Ozone removed annually by tree cover (kg/yr) This map estimates the total kilograms of ozone removed annually by trees in each census block group.          
Particulate matter [PM10] removed annually by tree cover (kg/yr) This map estimates the total kilograms of particulate matter greater than 2.5 microns but less than 10 microns that is removed annually by trees in each census block group.          
Particulate matter [PM2.5] removed annually by tree cover (kg/yr) This map estimates the total kilograms of particulate matter less than 2.5 microns that are removed annually by trees in each census block group.          
Percent agriculture This map estimates the percent of total land within each census block group that is managed for agriculture.          
Percent carbon monoxide removed annually by tree cover This map estimates the mean percent of carbon monoxide removed annually by tree cover in each census block group.          
Percent green space This map illustrates the percent of total land within each census block group that is covered by vegetation, or “green space.” Green space may include trees, lawns and gardens, crop land, and forested wetlands.          
Percent green space within 1/4 square kilometer This map illustrates the percent of total land within each ¼ square kilometer that is covered by vegetation, or “green space.” Green space may include trees, lawns and gardens, crop land, and forested wetlands.          
Percent impervious area This map illustrates the percent of total land within each census block group that is impervious. Impervious surfaces do not allow the penetration of water and include buildings, roads, and sidewalks.  
Percent impervious area in 15m stream and lake buffer This map estimates the percent land covered by impervious surfaces within 15 meters of hydrologically connected non-coastal waters in each census block group. Impervious surfaces are materials that do not allow the penetration of water and include buildings, roads, and sidewalks.      
Percent impervious area in 50m stream and lake buffer This map estimates the percent land covered by impervious surfaces within 50 meters of hydrologically connected non-coastal waters in each census block group. Impervious surfaces are materials that do not allow the penetration of water and include buildings, roads, and sidewalks.      
Percent impervious area within 1 square kilometer This map illustrates the percent of each square kilometer within the community area that is covered by impervious surfaces. It is not summarized by census block group. Impervious surfaces are materials that do not allow the penetration of water and include buildings, roads, and sidewalks.  
Percent land area in 15m stream and lake buffer This map estimates the percent land in each census block group that is within 15 meters of hydrologically connected non-coastal waters.      
Percent land area in 50m stream and lake buffer This map estimates the percent land in each census block group that is within 50 meters of hydrologically connected non-coastal waters.      
Percent nitrogen dioxide removed annually by tree cover This map estimates the mean percent of nitrogen dioxide removed annually by tree cover in each census block group.        
Percent of busy roadway bordered by < 25 percent tree buffer This map estimates the percent of busy roadway in each census block group that is bordered by less than 25 percent tree cover within 26 meters of a road edge. A “busy” roadway in EnviroAtlas is defined to include interstates, arterial roads, and collector roads. It does not include local or neighborhood roads, though some of these roads may also experience consistent and heavy traffic.        
Percent of busy roadway bordered by > 25 percent tree buffer This map estimates the percent of busy roadway in each census block group that is bordered by more than 25 percent tree cover within 26 meters of a road edge. A “busy” roadway in EnviroAtlas is defined to include interstates, arterial roads, and collector roads. It does not include local or neighborhood roads, though some of these roads may also experience consistent and heavy traffic.        
Percent of residential population not within 500m of a park entrance This map estimates the percent of the total population that does not live within 500 meters of a park entrance within each census block group.            
Percent of residential population with minimal views of trees This map estimates the percent of the population in each census block group who have less than 5 percent tree cover within 50 meters of their home.            
Percent of residential population with views of water This map estimates the percent of the population in each census block group that may have a view of water within 50 meters of their home. This map includes streams, lakes, rivers, and coastal waters.            
Percent of residential population within 300m of busy roadway This map estimates the percent of the population within each census block group that resides within 300 meters of a busy roadway. A “busy” roadway in EnviroAtlas is defined to include interstates, arterial roads, and collector roads. It does not include local or neighborhood roads, though some of these roads may also experience consistent and heavy traffic.            
Percent of residential population within 500m of a park entrance This map estimates the percent of the total population that resides within 500 meters of a park entrance within each census block group.            
Percent ozone removed annually by tree cover This map estimates the mean percent of ozone removed annually by tree cover in each census block group.          
Percent particulate matter [PM10] removed annually by tree cover This map estimates the mean percent of particulate matter greater than 2.5 microns but less than 10 microns removed annually by tree cover in each census block group.          
Percent particulate matter [PM2.5] removed annually by tree cover This map estimates the mean percent of particulate matter less than 2.5 microns removed annually by tree cover in each census block group.          
Percent reduction in annual runoff due to tree cover This map estimates the percent reduction in runoff each year due to trees in each census block group.          
Percent sulfur dioxide removed annually by treecover This map estimates the mean percent of sulfur dioxide removed annually by tree cover in each census block group.        
Percent tree cover This map illustrates the percent of total land within each census block group that is covered by trees. In EnviroAtlas, tree coverage takes many forms, including street trees, parks, urban forests, and single trees on various properties.  
Percent tree cover in 15m stream and lake buffer This map estimates the percent land covered by trees within 15 meters of hydrologically connected non-coastal waters in each census block group.      
Percent tree cover in 50m stream and lake buffer This map estimates the percent land covered by trees within 50 meters of hydrologically connected non-coastal waters in each census block group.      
Percent vegetated cover in 15m stream and lake buffer This map estimates the percent land covered by vegetation within 15 meters of hydrologically connected non-coastal waters in each census block group.      
Percent vegetated cover in 50m stream and lake buffer This map estimates the percent land covered by vegetation within 50 meters of hydrologically connected non-coastal waters in each census block group.      
Percent Wetlands This map illustrates the percent of total land within each census block group that is covered by wetlands.    
Reduction in annual runoff due to tree cover (m3/yr) This map estimates the reduction in surface runoff (m3/yr) each year within each census block group due to the presence of trees.          
Reduction in mean biochemical oxygen demand [BOD5] due to tree cover (kg/yr) This map estimates the reduction in mean biochemical oxygen demand (kg/yr) in streamflow due to filtration by trees in each census block group.            
Reduction in mean chemical oxygen demand [COD] due to tree cover (kg/yr) This map estimates the reduction in mean chemical oxygen demand (kg/yr) in streamflow due to filtration from trees in each census block group.            
Reduction in mean load of copper due to tree cover (kg/yr) This map estimates the reduction in mean load of copper (kg/yr) in streamflow due to filtration by trees in each census block group.            
Reduction in mean load of nitrites and nitrates due to tree cover (kg/yr) This map estimates the reduction in mean load of nitrites and nitrates (kg/yr) in streamflow due to filtration by trees in each census block group.            
Reduction in mean load of soluble phosphorus due to tree cover (kg/yr) This map estimates the reduction in mean load of soluble phosphorus (kg/yr) in streamflow due to filtration by trees in each census block group.            
Reduction in mean load of total Kjeldahl nitrogen [TKN] due to tree cover (kg/yr) This map estimates the reduction in mean load of total Kjeldahl nitrogen (kg/yr) in streamflow due to filtration by trees in each census block group.            
Reduction in mean load of total phosphorus due to tree cover (kg/yr) This map estimates the reduction in mean load of total phosphorus (kg/yr) in streamflow due to filtration by trees in each census block group.            
Reduction in mean load of total suspended solids [TSS] due to tree cover (kg/yr) This map estimates the reduction in mean load of total suspended solids (kg/yr) in streamflow due to filtration by trees in each census block group.          
Reduction in median biochemical oxygen demand [BOD5] due to tree cover (kg/yr) This map estimates the reduction in median load of biochemical oxygen demand (kg/yr) in streamflow due to filtration by trees in each census block group.            
Reduction in median chemical oxygen demand [COD] due to tree cover (kg/yr) This map estimates the reduction in median load of chemical oxygen demand (kg/yr) in streamflow due to filtration by trees in each census block group.            
Reduction in median load of copper due to tree cover (kg/yr) This map estimates the reduction in median load of copper (kg/yr) in streamflow due to filtration by trees in each census block group.            
Reduction in median load of nitrites and nitrates due to tree cover (kg/yr) This map estimates the reduction in median load of nitrites and nitrates (kg/yr) in streamflow due to filtration by trees in each census block group.            
Reduction in median load of soluble phosphorus due to tree cover (kg/yr) This map estimates the reduction in median load of soluble phosphorus (kg/yr) in streamflow due to filtration by trees in each census block group.            
Reduction in median load of total Kjeldahl nitrogen [TKN] due to tree cover (kg/yr) This map estimates the reduction in median load of total Kjeldahl nitrogen (kg/yr) in streamflow due to filtration by trees in each census block group.            
Reduction in median load of total phosphorus due to tree cover (kg/yr) This map estimates the reduction in median load of total phosphorus (kg/yr) in streamflow due to filtration by trees in each census block group.            
Reduction in median load of total suspended solids [TSS] due to tree cover (kg/yr) This map estimates the reduction in median load of total suspended solids (kg/yr) in streamflow due to filtration by trees in each census block group.          
Residential population not within 500m of a park entrance This map estimates the total population that does not reside within 500 meters of a park entrance within each census block group.            
Residential population with minimal views of trees This map estimates the number of people with less than 5 percent tree cover within 50 meters of their home.            
Residential population with views of water This map estimates the number of people in each census block group that may have a view of water within 50 meters of their home. This map includes streams, lakes, rivers, and coastal waters.            
Residential population within 300m of busy roadway This map estimates the population within each census block group that resides within 300 meters of a busy roadway. A “busy” roadway in EnviroAtlas is defined to include interstates, arterial roads, and collector roads. It does not include local or neighborhood roads, though some of these roads may also experience consistent and heavy traffic.            
Residential population within 300m of busy roadway with < 25 percent tree buffer This map estimates the percent of the population within each census block group that resides within 300 meters of a busy roadway that is buffered by less than 25 percent tree cover within 26 meters of a road edge. A “busy” roadway in EnviroAtlas is defined to include interstates, arterial roads, and collector roads. It does not include local or neighborhood roads, though some of these roads may also experience consistent and heavy traffic.            
Residential population within 300m of busy roadway with > 25 percent tree buffer This map estimates the population within each census block group that resides within 300 meters of a busy roadway that is buffered by more than 25 percent tree cover within 26 meters of a road edge. A “busy” roadway in EnviroAtlas is defined to include interstates, arterial roads, and collector roads. It does not include local or neighborhood roads, though some of these roads may also experience consistent and heavy traffic.            
Residential population within 500m of a park entrance This map estimates the total population that resides within 500 meters of a park entrance in each census block group.            
School days not lost to illness due to ozone removed by tree cover (days/yr) This map estimates the annual number of school days that may not be lost to illness due to total ozone removed by trees in each census block group.            
Sulfur dioxide removed annually by treecover (kg/yr) This map estimates the total kilograms of sulfur dioxide removed annually by trees in each census block group.        
Total carbon sequestered by tree cover (mt/yr) This map portrays the total metric tons of carbon that are removed annually from the atmosphere and sequestered in the above-ground biomass of trees in each census block group.            
Total carbon stored by tree cover (mt) This map portrays the total metric tons of carbon stored in the above-ground biomass of trees by census block group.            
Total land area in 15m stream and lake buffer (m2) This map estimates the square meters of land within 15 meters of hydrologically connected non-coastal waters in each census block group.      
Total land area in 50m stream and lake buffer (m2) This map estimates the square meters of land within 50 meters of hydrologically connected non-coastal waters in each census block group.      
Tree cover per capita (m2/person) This map estimates the square meters of land per person that is covered by trees within each census block group. In EnviroAtlas, tree coverage takes many forms, including street trees, parks, urban forests, and single trees on various properties.    
Value of carbon sequestered by tree cover ($/yr) This map portrays the dollar value associated with the estimated annual amount of carbon that is removed from the atmosphere and sequestered in the above-ground biomass of trees in each census block group.            
Value of carbon stored by tree cover ($) This map portrays the dollar value associated with the estimated total amount of carbon stored in the above-ground biomass of trees within each census block group.            
Value of health, ecosystem, and materials damage avoided due to carbon monoxide removed ($/yr) This map estimates the dollar value associated with annual damage to health, ecosystems, and materials that may be avoided due to carbon monoxide removed by trees in each census block group.            
Value of health, ecosystem, and materials damage avoided due to particulate matter [PM10] removed ($/yr) This map estimates the dollar value associated with annual damage to health, ecosystems, and materials that may be avoided due to particulate matter [PM10] removed by trees in each census block group.            
Value of hospital admissions avoided due to nitrogen dioxide removed by tree cover ($/yr) This map estimates the dollar value associated with the annual number of hospital admissions that may be avoided due to total nitrogen dioxide removed by trees in each census block group.            
Value of hospital admissions avoided due to sulfur dioxide removed by tree cover ($/yr) This map estimates the dollar value associated with the annual number of hospital admissions that may be avoided due to total sulfur dioxide removed by trees in each census block group.            
Value of school days not lost to illness due to ozone removed by tree cover ($/yr) This map estimates the dollar value associated with the annual number of school days that may not be lost to illness due to total ozone removed by trees in each census block group.            

Data layer name

Description

Watersheds This dataset contains polygons and points representing the location of markets and projects primarily targeting watershed-related ecosystem services per Ecosystem Marketplace research.
Imperiled Species and Habitats This dataset contains polygons and points representing the location of markets and projects primarily targeting imperiled species and/or habitat ecosystem services per USACE RIBITS data and Ecosystem Marketplace research.
Wetlands and Streams This dataset contains polygons and points representing the location of markets and projects primarily targeting wetland and stream ecosystem services per USACE RIBITS data and Ecosystem Marketplace research.
Forest Carbon This dataset contains polygons and points representing the location of markets and projects primarily targeting forest carbon-related ecosystem services per Ecosystem Marketplace research.
Enabling Conditions This dataset contains polygons representing guidance, enabling policies, and regulatory drivers that facilitate ecosystem services markets per Ecosystem Marketplace research. It includes conditions that specifically establish ecosystem market mechanisms, as well as conditions that indirectly function as the regulatory driver for ecosystem markets. Data cover watershed, Imperiled Species and Habitats, wetland and streams, and forest carbon asset types. Scales represented include watershed (HUC8), state, regional, national, and federal lands.

Data Layer Name

Description

National Demographics

People and Built Spaces - National

People and Built Spaces - Community

Quality of Life

Percent 25 Years And Over With A High School Degree This map estimates the percent of population 25 years and over with a high school degree by census tract. The values were calculated using data extracted from American Community Survey tables (2006-2010).      
Percent 25 Years And Over With Less Than A High School Degree This map estimates the percent of population 25 years and over with less than a high school degree by census tract. The values were calculated using data extracted from American Community Survey tables (2006-2010).      
Percent Age Less Than 18 Years Old This map estimates the percent of population less than 18 years old by census tract. The values were calculated using data extracted from American Community Survey tables (2006-2010).      
Percent Age Less Than 5 Years Old This map estimates the percent of population less than 18 years old by census tract. The values were calculated using data extracted from American Community Survey tables (2006-2010).      
Percent Below Poverty Level This map estimates the percent of population below poverty level by census tract. The values were calculated using data extracted from American Community Survey tables (2006-2010).      
Percent Housing Units Built Before 1950 This map estimates the percent of housing units built before 1950 by census tract. The values were calculated using data extracted from American Community Survey tables (2006-2010).      
Percent Linguistically Isolated Households This map estimates the percent of population living in linguistically isolated households by census tract. The values were calculated using data extracted from American Community Survey tables (2006-2010).      
Percent Minority This map estimates the percent of minority population by census tract. The values were calculated using data extracted from American Community Survey tables (2006-2010).      
Percent Population Age Greater Than 64 Years Old This map estimates the percent of population greater than 64 years old by census tract. The values were calculated using data extracted from American Community Survey tables (2006-2010).      
Population Density (per square mile) This map estimates population density (per square mile) by census tract. The values were calculated using data extracted from American Community Survey tables (2006-2010).      
Population of American Indian and Alaskan Native This map estimates the number of American Indians and Alaskan Natives by census tract. The values were calculated using data extracted from American Community Survey tables (2006-2010).      
Population of American Indian and Alaskan Native Below Poverty Level This map estimates the number of American Indians and Alaskan Natives below poverty level by census tract. The values were calculated using data extracted from American Community Survey tables (2006-2010).      
Total Population This map estimates total population by census tract. The values were calculated using data extracted from American Community Survey tables (2006-2010).      
Employment density (jobs/ac) This map estimates employment density (or jobs per acre) within each census block group. Developed acreage is calculated by excluding parks, water bodies, conservation easements, and other protected areas.      
Employment diversity This map portrays a measure of employment diversity within each census block group. Job counts used in the equation are from eight employment categories: retail, office, service, industrial, entertainment, education, healthcare, and public administration.      
Employment rate This map estimates the employment rate calculated as the percent of the population aged 16-64 who have worked in the past 12 months by block group. It includes people who worked any number of hours per week. The data are based on the American Community Survey 5-year data for 2008-2012.      
Employment to housing ratio This map estimates the jobs-to-housing balance (or total employment divided by total occupied housing units) within each census block group for 2010.      
Jobs within a 45-minute drive, weighted This map indicates the relative accessibility to jobs from residences via automobile (in terms of street network travel time) for each census block group, compared to other block groups in the same metropolitan region. Jobs in nearby block groups (based on travel time) are weighted more heavily than those further away.      
Number of high-wage workers (work location) This map estimates the number of workers earning more than $3,333 per month summarized by workplace location within each census block group.      
Number of households This map illustrates the number of households (i.e., occupied housing units) within each census block group in 2010. A household consists of all people who occupy a housing unit regardless of relationship.      
Number of households with zero vehicles This map illustrates the number of households without vehicles within each census block group in 2010. The word vehicle refers to private motor vehicles such as cars and trucks.      
Number of low-wage workers (home location) This map estimates the number of workers earning $1,250 or less per month summarized by residence within each census block group.      
Number of low-wage workers (work location) This map estimates the number of workers earning $1,250 or less per month summarized by workplace location within each census block group.      
Number of middle-wage workers (work location) This map estimates the number of workers earning between $1250 and $3,333 per month summarized by workplace location within each census block group.      
Number of workers (home location) This map illustrates the total number of workers by home location in 2010 within each census block group.      
Pedestrian-oriented street intersection density This map estimates the degree of pedestrian-oriented street connectivity for each census block group, measured as street intersections per square mile. Intersections that exclude pedestrian passage were not counted.      
Percent of low-wage workers (work location) This map estimates the percentage of all workers within each census block group earning $1,250 or less per month based on their workplace location.      
Percent of households with zero vehicles This map estimates zero-vehicle households as a percentage of all households within each census block group in 2010. The word vehicle refers to private motor vehicles such as cars and trucks.      
Percent of workers who bike or walk to work This map estimates the percent of workers who bike or walk to work. The data are based on the American Community Survey 5-year data for 2008-2012.      
Percent of workers who carpool to work This map estimates the percent of workers who carpool to work. The data are based on the American Community Survey 5-year data for 2008-2012.      
Percent of workers who commute to work by public transportation This map estimates the percent of workers who commute to work by public transportation. The data are based on the American Community Survey 5-year data for 2008-2012.      
Percent of workers who drive to work alone This map estimates the percent of workers who drive to work alone. The data are based on the American Community Survey 5-year data for 2008-2012.      
Percent of workers who work from home This map estimates the percent of workers who work from home. The data are based on the American Community Survey 5-year data for 2008-2012.      
Percent of workers with < 30 minutes travel time to work This map estimates the percent of workers within each block group with less than 30 minutes travel time to work.      
Percent of workers with > 90 minutes travel time to work This map estimates the percent of workers within each block group with more than 90 minutes travel time to work.      
Percent of workers with 30 to 60 minutes travel time to work This map estimates the percent of workers within each block group with travel time to work ranging from 30 to 60 minutes.      
Percent of workers with 60 to 90 minutes travel time to work This map estimates the percent of workers within each block group with travel time to work ranging from 60 to 90 minutes.      
Residential density This map estimates residential density (or housing units per acre) within each census block group. Developed acreage is calculated by excluding parks, water bodies, conservation easements, and other protected areas.      
Total employment This EnviroAtlas map layer estimates the total number of jobs in 2010 within each U.S. Census block group.      
Total housing units This map illustrates the number of housing units (both occupied and vacant) within each census block group in 2010. A housing unit is any living quarters, such as a house, apartment, or mobile home.      
Transit service per hour during evening peak This map estimates the aggregate frequency of public transit service (trips per hour) in each census block group. Frequency reflects service during weekday afternoon peak commute period (4:00–7:00 pm).      
Workers per job equilibrium index This map illustrates an index that measures the balance between workers and jobs within each census block group. An index value close to one indicates a balance between resident workers and jobs.      
Working age population within a 45-minute drive, weighted This map indicates the relative accessibility to working age populations (residences) from employment locations via auto commute (in terms of street-network travel time) for each census block group. People living in nearby block groups (based on travel time) are weighted more heavily than those further away.      
Estimated Intersection Density of Walkable Roads This EnviroAtlas dataset estimates the intersection density of walkable roads within a 750 meter radius of any given 10 meter pixel in the community. Intersections are defined as any point where 3 or more roads meet and density is calculated using kernel density, where closer intersections are weighted higher than further intersections. Intersection density is highly correlated with walking for transportation.      
Number of day care centers This map shows the number of day care centers in each census block group.      
Number of schools (K-12) This map shows the number of K-12 schools in each census block group.      
Percent population other than White, non-Hispanic This map estimates the percent of the population of each census block group that identified as not White Alone in 2010. This value includes white Hispanics.      
Percent population over 70 years old This map estimates the percent of the population of each census block group aged 70 years or older in 2010.      
Percent population under 13 years old This map estimates the percent of the population of each census block group under 13 years of age in 2010.      
Percent population under 1 year old This map estimates the percent of the population of each census block group under one year of age in 2010.      
Percent population with income below twice the poverty level This map estimates the percent of the population of each census block group with income less than two times the relative household poverty level in 2010.      
Population other than White, non-Hispanic This map estimates the number of individuals in each census block group who did not identify as White Alone in 2010. This value includes white Hispanics.      
Population under 13 years old This map estimates the number of individuals in each census block group that were under 13 years of age in 2010.      
Population over 70 years old This map estimates the number of individuals in each census block group that were 70 years of age or older in 2010.      
Population under 1 year old This map estimates the number of individuals in each census block group that were under one year of age in 2010.      
Population with income below twice the poverty level This map estimates the number of individuals in each census block group with income less than two times the poverty level in 2010.      
Total Population This map estimates the total population of each census block group in 2010.      
Population [12-digit HUC] This map estimates the total population that lives in each 12-digit HUC for 2010.      
Business address vacancy rate for 2014 This map displays the percentage of business addresses that had remained vacant for more than one year in 2014. This layer is based on the United States Postal Service (USPS) Vacant Address Data.      
Change in business vacancy rate from 2010-2014, in percentage points This map displays the change in the business vacancy rate from 2010-2014 in percentage points (2014 rate minus 2010 rate). This layer is based on the United States Postal Service (USPS) Vacant Address Data. Vacant buildings are included if they remained vacant for more than one year.td>      
Residential address vacancy rate for 2014 This map displays the percentage of residential addresses that had remained vacant for more than one year in 2014. This layer is based on the United States Postal Service (USPS) Vacant Address Data.      
Change in residential vacancy rate from 2010-2014, in percentage points This map displays the change in the residential vacancy rate from 2010-2014 in percentage points (2014 rate minus 2010 rate). This layer is based on the United States Postal Service (USPS) Vacant Address Data. Vacant buildings are included if they remained vacant for more than one year.      
Percentage of households with incomes above twice the poverty line and below $75,000 Percentage of households with incomes above twice the poverty line ($30,000) and below $75,000 in the past 12 months (2008-2012).      
Percentage of households with incomes above $75,000 and below $200,000 Percentage of households with incomes above $75,000 and below $200,000 in the past 12 months (2008-2012)      
Percentage of households with incomes above $200,000 Percentage of households with incomes above $200,000 in the past 12 months (2008-2012)      
Percentage of households below the quality of life threshold income Percentage of households below the adjusted quality of life threshold income for their county (2008-2012). The threshold is the average optimal household income for quality of life, adjusted to reflect county cost of living.      
Threshold income for quality of life Threshold income for quality of life (household), based on national value adjusted to reflect county cost of living (2008-2012).      

Data layer name

Description

Boundaries

Biophysical Data - Vector

Biophysical Data - Raster - Community

Biophysical Data - Raster - National

EPA WATERS Data

Austin, TX and Vicinity The EnviroAtlas boundary for the Austin area was determined using the 2010 Census definition of an Urban Area.        
Congressional Districts This map depicts the boundaries of U.S. Congressional Districts.        
MSPA Connectivity with water as background and 30-meter edge with for the conterminous U.S. This EnviroAtlas dataset categorizes land cover into structural elements such as core, edge, or connector. Water is treated as background in this dataset, and edges have a width of 1 pixel (30 meters).        
MSPA Connectivity with water as background and 90-meter edge with for the conterminous U.S. This EnviroAtlas dataset categorizes land cover into structural elements such as core, edge, or connector. Water is treated as background in this dataset, and edges have a width of 3 pixels (90 meters).        
MSPA Connectivity with water as foreground and 30-meter edge with for the conterminous U.S. This EnviroAtlas dataset categorizes land cover into structural elements such as core, edge, or connector. Water is treated as foreground in this dataset, and edges have a width of 1 pixel (30 meters).        
MSPA Connectivity with water as foreground and 90-meter edge with for the conterminous U.S. This EnviroAtlas dataset categorizes land cover into structural elements such as core, edge, or connector. Water is treated as foreground in this dataset, and edges have a width of 3 pixels (90 meters).        
MSPA connectivity with water as missing and 30-meter edge width for the conterminous U.S. This EnviroAtlas dataset categorizes land cover into structural elements such as core, edge, or connector. Water is treated as missing in this dataset, and edges have a width of 1 pixel (30 meters).        
MSPA connectivity with water as missing and 90-meter edge width for the conterminous U.S. This EnviroAtlas dataset categorizes land cover into structural elements such as core, edge, or connector. Water is treated as missing in this dataset, and edges have a width of 3 pixels (90 meters).        
Dasymetric Allocation of Population This dasymetric population map intelligently reallocates 2010 population from census blocks to 30 meter pixels based on land cover and slope. It is used for metrics that require population to be spatially allocated at a pixel level, primarily in the urban section of the atlas.         
Des Moines, IA and Vicinity The EnviroAtlas boundary for the Des Moines area was determined using the 2010 Census definition of an Urban Area. In addition to Des Moines, it includes West Des Moines, Ankeny, and Urbandale, as well as additional towns within Polk, Dallas, and Warren Counties.        
Durham, NC and Vicinity The EnviroAtlas boundary for the Durham area was determined using the 2000 Census definition of an Urban Area. It includes Durham, Chapel Hill, Carrboro, and Hillsborough.        
EPA Assessed and Impaired Waters This category contains maps of waterbodies that have been assessed by states, territories, and authorized tribes every two years to evaluate waterbody condition for seven beneficial uses (e.g. aquatic life habitat, drinking water supply, and fish consumption). Those waterbodies not meeting the standards for beneficial uses are designated as impaired or threatened. Note: EnviroAtlas is accessing an externally sourced web service and therefore does not manage the content or display of this service or data layer.        
EPA Region Boundaries with Exclusive Economic Zone This web service layer shows the boundaries of EPA regions and exclusive economic zones based on 2011 TIGER/Line and NOAA U.S. Maritime Boundaries geometry. This dataset was produced by EPA through the Office of Environmental Information (OEI).        
EPA Regions This web service layer shows the boundaries of EPA regions based on 2011 TIGER/Line geometry. This dataset was produced by EPA's Office of Environmental Information (OEI).        
EnviroAtlas Community Meter Scale Urban Land Cover (MULC) This data layer contains the 1-meter resolution land cover for all EnviroAtlas communities. The fine-scale of the data provides a detailed view of the urban environment and enables the development of relevant human and ecosystem health metrics and services.        
Estimated intersection density of walkable roads This EnviroAtlas community map depicts one aspect of the built environment that can affect communities. The density of walkable intersections was determined by a distance-based kernel density calculation.        
Fresno, CA and Vicinity The EnviroAtlas boundary for the Fresno, CA area was determined using the 2010 Census definition of an Urban Area. It includes the greater Fresno area, as well as Clovis and other portions of Fresno County.        
GAP Ecological Systems This category contains GAP (Gap Analysis Program) Ecological Systems maps. Using consistent satellite base data and classification systems, GAP land cover provides detailed information on the vegetation of the United States, including Alaska and Hawaii. Note: EnviroAtlas is accessing an externally sourced web service and therefore does not manage the content or display of this service or data layer.        
GAP Status Code This map illustrates protected land status as found in the Protected Areas Database of the U.S. (PAD-US). Land Protection Status areas are mapped with one of three Gap Analysis Program Status Codes—areas where 1) ecological disturbance events are allowed to proceed; 2) ecological disturbances such as fire are suppressed; and 3) resource extraction and off-road vehicle travel are allowed. Note: this data layer is an externally sourced web service accessed by EnviroAtlas.        
Green Bay, WI and Vicinity The EnviroAtlas boundary for the Green Bay area was determined using the 2010 Census definition of an Urban Area. In addition to Green Bay, it includes portions of De Pere and the Oneida Tribal Lands, as well as additional towns within Blayern and Outagamie Counties.        
Hydrologic Units (HUCs) Hydrologic Unit Boundaries used for EnviroAtlas data processing (HUC (12 Digit) Subwatershed) and other Hydrologic Unit Levels. Note: EnviroAtlas is accessing an externally sourced web service and therefore does not manage the content or display of this service or data layer.        
IUCN Category This layer contains maps that illustrate lands that are protected according to International Union for Conservation of Nature (IUCN) guidelines and their management objectives.        
Milwaukee, WI and Vicinity The EnviroAtlas boundary for the Milwaukee area was determined using the 2010 Census definition of an Urban Area. It includes the greater Milwaukee area, as well as portions of Waukesha, Washington, and Ozaukee counties.        
National Hydrography Dataset (NHD Plus v2.1) EnviroAtlas version of NHDPlus V2.1 service displaying main path flowlines and areas/waterbodies. Flowlines are separated out to display 3rd Order and smaller flowline features in one layer and 4th Order and higher flowline features in another.        
National Land Cover (NLCD) This map category contains land cover maps depicting landcover and change between 1992 and 2011. For additional information, go to https://www.mrlc.gov/. Note: EnviroAtlas is accessing an externally sourced web service and therefore does not manage the content or display of this service or data layer.        
National Wetlands Inventory This National Wetlands Inventory (NWI) map, developed by the U.S. Fish and Wildlife Service, clasifies wetlands across the U.S. State and local government agencies use NWI in planning to identify local wetlands and to limit and mitigate wetland losses during economic development. Note: EnviroAtlas is accessing an externally sourced web service and therefore does not manage the content or display of this service or data layer.        
New Bedford, MA and Vicinity The EnviroAtlas boundary for the New Bedford area was determined using the 2010 Census definition of an Urban Area. In addition to New Bedford, it includes portions of Dartmouth, East Freetown, and Mattapoisett, as well as additional towns within Bristol and Plymouth Counties.        
New York, NY and Vicinity The EnviroAtlas boundary for the New York area was determined using the 2010 Census definition of an Urban Area.        
Paterson, NJ and Vicinity The EnviroAtlas boundary for the Paterson, New Jersey urban area was determined using the 2011 municipal area from NAVTEQ.        
Percent green space along walkable roads This EnviroAtlas community map estimates the percentage of green space within an estimated pedestrian area alongside walkable roads.        
Percent tree cover along walkable roads This EnviroAtlas community map estimates the percentage of tree cover within an estimated pedestrian area alongside walkable roads.        
Phoenix, AZ and Vicinity The EnviroAtlas boundary for the Phoenix area was determined using the 2010 Census definition of an Urban Area. It includes Phoenix, Mesa, and surrounding towns in Maricopa County. It also includes the territories of two Tribes—Salt River Pima-Maricopa, and the Yavapai Nation.        
Pittsburgh, PA and Vicinity The EnviroAtlas boundary for the Pittsburgh area was determined using the 2010 Census definition of an Urban Area. It includes the city and suburbs of Pittsburgh—most of Allegheny County.        
Portland, ME and Vicinity The EnviroAtlas boundary for the Portland area was determined using the 2010 Census definition of an Urban Area. In addition to Portland, it includes portions of Biddeford and Yarmouth, as well as additional towns within York and Cumberland Counties.        
Portland, OR and Vicinity The EnviroAtlas boundary for the Portland area was determined using the 2010 Census definition of an Urban Area. In addition to Portland, it includes Vancouver, WA, as well as additional towns within Clackamas, Washington and Multnomah Counties (OR), and Clark County, WA.        
Potential Wetland Areas This EnviroAtlas map depicts potential wetland areas in the U.S. which are defined, in this case, as areas that naturally accumulate water and contain some proportion of poorly- or very poorly-drained soils. This dataset was produced by combining digital elevation and soil drainage information.        
Potentially Restorable Wetlands On Agricultural Land This EnviroAtlas map depicts potentially restorable wetlands on agricultural land in the U.S. which are defined, in this case, as agricultural areas that naturally accumulate water and contain some proportion of poorly- or very poorly-drained soils. This dataset was produced by combining land cover, digital elevation, and soil drainage information.        
Rare Ecosystems This map for rare ecosystems in the conterminous U.S. delineates the Relative Rarity Metric developed by the EPA. The metric is based on current extent, spatial pattern type, and relative uniqueness. Metric values range from 0 to 100 with higher values indicating greater relative ecosystem rarity.        
State/County/Census Block Groups Boundaries used for EnviroAtlas data processing (communities and HUC (12 Digit) Subwatershed) and other reference boundary data (i.e., states).        
Tampa, FL and Vicinity The EnviroAtlas boundary for the Tampa area was determined using the 2010 Census definition of an Urban Area. It includes Tampa, Clearwater, and St. Petersburg, as well as additional portions of Hillsborough, Pinellas, and Pasco Counties.        
EnviroAtlas Community Tree Cover Configuration and Connectivity These 1-meter resolution maps categorize tree cover into structural elements (e.g. core, edge, connector, etc.) for each EnviroAtlas community.        
US EPA Ecoregions (Omernik) This category contains maps of Level III and IV USEPA (Omernik) Ecoregions of the United States. Note: EnviroAtlas is accessing an externally sourced web service and therefore does not manage the content or display of this service or data layer.        
Woodbine, IA and Vicinity The EnviroAtlas boundary for the Woodbine area was determined using the 2010 Census definition of an Urban Area.        
Waterscape - Surface water Surface water identified in EnviroAtlas' hybrid National Land Cover Database-Cropland Data Layer or the NHDPlusV2 catseed grid. The land cover classes, 'Open Water', 'Woody Wetlands', and 'Emergent Herbaceous Wetlands' were considered surface water.        
Waterscape - Hydrologically connected zone Raster showing the hydrologically connected zone, defined as surface water plus any connected cells with high water acculmulation. This map uses a wetness index of 550 from a compound topographic index (CTI) to determine if the area is considered to be wet.        
Waterscape - Riparian zone Raster showing the riparian zone, defined as land within 108 meters of surface water identified in the NHDPlusV2 catseed grid or in EnviroAtlas' hybrid National Land Cover Database-Cropland Data Layer (including 'Open Water', 'Woody Wetlands', and 'Emergent Herbaceous Wetlands').