U.S. Environmental Protection Agency

Metadata for R8_CTB

Census tract boundaries and associated demographic data

Abstract
Purpose
Supplemental Information

Data_Quality_Information
Spatial_Reference_Information
Entity_and_Attribute_Information

Distribution_Information
Metadata_Reference_Information

Text between this line and the next follows the hierarchy of data elements in the FGDC Content Standards for Digital Geospatial Metadata. Narratives written for earlier metadata of this data set sometimes did not match the FGDC sections. Where necessary, hypertext pointers were used to avoid rewriting the narrative.

Identification_Information:

Citation_Information:

  Originator: 
  Publication_Date: 1993
  Title: Centract boundaries and demographic database and cvoverage
   Publication_Information
        Publication_Place:  Denver, Colorado
        Publisher:          US EPA REGION 8 TMS-ISP

Description:

Census tract boundaries and assoicated demographic data

Abstract:

   This coverage contains Census Tract boundaries and associated                
   demographic data. "Census tracts are small, relatively permanent             
   statistical subdivisions of a county. Census tracts are delineated           
   for all metropolitan areas (MAs) and other densely populated counties        
   by local census statistical areas committees following Census                
   Bureau guidelines (more than 3,000 census tracts have been established       
   in 221 counties outside MAs)... Census tracts usually have between           
   2,500 and 8,000 persons and, when first delineated, are designed to          
   be homogenous with respect to population characteristics, economic           
   status, and living conditions. The spatial size of census tracts             
   varies widely depending on the density of settlement. Census tract           
   boundaries are delineated with the intention of being maintained over        
   a long time so that census. However, physical changes in street              
   patterns caused by highway construction, new development, etc., may          
   require occasional revisions; census tracts occasionally are split           
   due to large population growth, or combined as a result of substantial       
   population decline. Census tracts are referred to as 'tracts' in all         
   1990 census data products." (p.10-11)

Purpose:

   This database and coverage are suitable for Arc/Info and related             
   applications.                                                                
                                                                                
   Intended use of data:                                                    
   Mapping of census tract boundaries and demographic analysis for              
   environmental justice issues.

Supplemental_Information:

Limitations_of_Data:

   None noted.

Procedures:

    The boundaries were extracted from TIGER files. The demographic             
    data were taken from the STF3A files and attached to the                    
    polygonal boundaries.

Reviews_Applied:

    None.

Other_Related_Data_Sets:

    r8_cbg contains block group boundaries and demographic data at that         
    level. r8_cdp contains the boundaries of census designated places           
    and related demographic information.

References_Cited:

    U.S. Department of Commerce, Economics and Statistics Administration,       
        Bureau of the Census (1990). _1990 Census of Population and             
        Housing; Guide Part B. Glossary_ 1990 CPH-R-1B.

Notes:

    None.

Other:

Time_Period_of_Content:

    Time_Period_Information:
      Single_Date/Time:
      Calendar_Date: 1993
    Currentness_Reference: publication date

Status:

    Progress: Complete
    Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

    Bounding_Coordinates:
      West_Bounding_Coordinate: -116.2321
      East_Bounding_Coordinate: -95.3263
      North_Bounding_Coordinate: 48.9500
      South_Bounding_Coordinate: 36.6588

Keywords:

    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword:  Census Tract Boundaries

Access_Constraints:

    None

Use_Constraints:

    None

Security_Information:

    Security_Classification:  UNCLASSIFIED

Native_Data_Set_Environment:

    Arc/INFO

Data_Quality_Information:

Logical_Consistency_Report:

    Polygon and chain-node topology present.

Completeness_Report:

    See Supplemental_Information

Positional_Accuracy:

  Horizontal_Positional_Accuracy: See Supplemental_Information
    Quantitative_Horizontal_Positional_Accuracy_Assessment:
    Horizontal_Positional_Accuracy_Value: na
  Vertical_Positional_Accuracy: See Supplemental_Information

Lineage:

  See Supplemental_Information for overview.
    None noted.

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

    Planar:
      Map_Projection:
        Map_Projection_Name: Albers Conical Equal Area
        Alber_Conical_Equal_Area:
           Standard_Parallel: 38 
           Standard_Parallel: 48 
         Longitude_of_Central_Meridian: -106
          Latitude_of_Projection_Origin: 37
           False_Easting: 0.00000
           False_Northing: 0.00000
    Geodetic_Model
      Horizontal_Datum_Name:  North American Datum of 1983
      Ellipsoid_Name:   Geodetic Reference System 80
      Semi-major_Axis:  6378137
      Denominator_of_Flattening_Ratio:  298.257

Entity_and_Attribute_Information:

Detailed_Description:

  Entity_Type:
    Entity_Type_label:  R8_CTB.PAT
    Entity_Type_Definition:  Contains boundaries of census tracts and 
        associated demographic data
    Number_of_Attributes_in_Entity:  37
    Attribute:
      Attribute_Label:  -
      Attribute_Definition:  Contains boundaries of census tracts and 
          associated demographic data
      Attribute_Definition_Source:  TIGER and STF3A
      Attribute_Domain_Values:  -
    Attribute:
      Attribute_Label:  AREA
      Attribute_Definition:  Area of poly/region in square coverage units
      Attribute_Definition_Source:  Computed
      Attribute_Domain_Values:  Positive real numbers
    Attribute:
      Attribute_Label:  PERIMETER
      Attribute_Definition:  Perimeter of poly/region in coverage units
      Attribute_Definition_Source:  Computed
      Attribute_Domain_Values:  Positive real numbers
    Attribute:
      Attribute_Label:  R8_CTB#
      Attribute_Definition:  Internal feature number
      Attribute_Definition_Source:  Computed
      Attribute_Domain_Values:  Sequential unique positive integer
    Attribute:
      Attribute_Label:  R8_CTB-ID
      Attribute_Definition:  User-assigned feature number
      Attribute_Definition_Source:  User-defined
      Attribute_Domain_Values:  Integer
    Attribute:
      Attribute_Label:  STCNTYFP
      Attribute_Definition:  State and County FIPS code
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  5-digit code
    Attribute:
      Attribute_Label:  CTBNA
      Attribute_Definition:  Census tract and block numbering area
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  6-digit code
    Attribute:
      Attribute_Label:  WEIGHTAREA
      Attribute_Definition:  Percentage of the total area of the 
          tract if divided into 2 or more polys
      Attribute_Definition_Source:  generated internally by ESAT
      Attribute_Domain_Values:  6-digit number with 2 decimal places
    Attribute:
      Attribute_Label:  FREQ
      Attribute_Definition:  Number of polys that make up the census tract
      Attribute_Definition_Source:  generated internally by ESAT
      Attribute_Domain_Values:  3-digit number
    Attribute:
      Attribute_Label:  NUM_MINORITY
      Attribute_Definition:  Number of minorities in the census tract
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  up to 9-digit number
    Attribute:
      Attribute_Label:  PCT_MINORITY
      Attribute_Definition:  Percent minority population in the tract
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  6-digit number
    Attribute:
      Attribute_Label:  NUM_POVERTY
      Attribute_Definition:  number of people in poverty in the tract
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  up to 9 digits
    Attribute:
      Attribute_Label:  PCT_POVERTY
      Attribute_Definition:  Percent population in poverty in the tract
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  up to 6 digits
    Attribute:
      Attribute_Label:  P0010001
      Attribute_Definition:  Total population
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P0120001
      Attribute_Definition:  Whites, not of Hispanic origin
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P0120002
      Attribute_Definition:  Blacks, not of Hispanic origin
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P0120003
      Attribute_Definition:  American Indians, Eskimos, or Aleuts 
          not of Hispanic origin
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P0120004
      Attribute_Definition:  Asians or Pacific Islanders not of Hispanic origin
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P0120005
      Attribute_Definition:  Number of people of other races not of Hispanic origin
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P0120006
      Attribute_Definition:  Whites of Hispanic origin
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P0120007
      Attribute_Definition:  Blacks of Hispanic origin
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P0120008
      Attribute_Definition:  American Indians, Eskimos, or Aleuts of 
          Hispanic origin
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P0120009
      Attribute_Definition:  Asian or Pacific Islanders of 
          Hispanic origin
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P0120010
      Attribute_Definition:  Number of people of other races of Hispanic origin
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P080A001
      Attribute_Definition:  Median household income in 1989
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P0840001
      Attribute_Definition:  Aggregate household income for Whites in 1989
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P0850001
      Attribute_Definition:  Aggregate household income in 1989 for 
          all people of Hispanic origin
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P107A001
      Attribute_Definition:  Median family income in 1989
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P114A001
      Attribute_Definition:  Per capita income in 1989
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P115A001
      Attribute_Definition:  Aggregate income in 1989 for Whites
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P115A002
      Attribute_Definition:  Per capita income in 1989 for Blacks
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P115A003
      Attribute_Definition:  Per capita income for 1989 for American 
          Indians, Eskimos, or Aleuts
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P115A004
      Attribute_Definition:  Per capita income in 1989 for Asians or Pacific Islanders
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P115A005
      Attribute_Definition:  Per capita income in 1989 for all other races
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  P116A001
      Attribute_Definition:  Per capita income in 1989 for all people of Hispanic origin
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  binary digits
    Attribute:
      Attribute_Label:  TRACTKEY
      Attribute_Definition:  Code with State and County FIPS code and Tract number
      Attribute_Definition_Source:  generated internally
      Attribute_Domain_Values:  11-digit code
    Attribute:
      Attribute_Label:  STATE
      Attribute_Definition:  State in which the tract is located
      Attribute_Definition_Source:  STF3A
      Attribute_Domain_Values:  2-character code (CO,MT,ND,SD,WY,UT)

Overview_Description:

Entity_and_Attribute_Overview:

   See attribute discussion.                                                    
                                                                                
    Entity_and_Attribute_Detail_Citation: See Entity_and_Attribute_Information

Distribution_Information:

    Contact_Information
      Contact_Organization_Primary
        Contact_Organization:  US EPA REGION 8 TMS-ISP
        Contact_Person:        Karl Hermann
      Contact_Address
        Address_Type:  mailing and physical address
        Address:            999 18th Street, Suite 300
        City:               Denver
        State_or_Province:  Colorado
        Postal_Code:        80202-2466
        Country:            USA
      Contact_Voice_Telephone:          (303) 312-6628
      Contact_Facsimile_Telephone:      (303) 312-7554
      Contact_Electronic_Mail_Address:  hermann.marilynn@epa.gov
      Hours_of_Service:  Monday-Friday 8-4:30, Mountain Time
  Distribution_Liability:  Although these data have been processed
     successfully on a computer system at the U.S. EPA, no warranty
     expressed or implied is made by the EPA regarding the utility of the data
     on any other system, nor shall the act of distribution constitute
     any such warranty.
  Standard_Order_Process:  See contact information above.
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: ARCEXPORT
    Fees: None.
    Available_Time_Period: Immediate.

Metadata_Reference_Information:

  Metadata_Date: 20000808
   Metadata_Contact
    Contact_Information
      Contact_Organization_Primary
        Contact_Organization:  US EPA REGION 8 TMS-ISP
        Contact_Person:        Marilynn Mueller
      Contact_Address
        Address_Type:  mailing and physical address
        Address:            999 18th Street, Suite 300
        City:               Denver
        State_or_Province:  Colorado
        Postal_Code:        80202-2466
        Country:            USA
      Contact_Voice_Telephone:          (303) 312-6679
      Contact_Facsimile_Telephone:      (303) 312-7554
      Contact_Electronic_Mail_Address:  mueller.marilynn@epa.gov
      Hours_of_Service:  Monday-Friday 8-4:30, Mountain Time

  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version:  19940608
  Metadata_Time_Convention:  Local Time

Last modified: 01-05-14.14:35:30.Mon