Atmospheric Modeling and Analysis Research
The Spatial Allocator was developed for EPA by the Institute for the Environment at the University of North Carolina at Chapel Hill. This tool can be used by the air quality modeling community to perform commonly-needed spatial tasks without requiring the use of a commercial Geographic Information System (GIS). There are three components to the Spatial Allocator:
- Vector Tools: These tools process vector GIS data to perform functions such as mapping data from counties to grids and visa versa.
- Raster Tools: These tools process raster data to perform functions such as converting National Land Cover Database (NLCD) land use data into gridded land use.
- Surrogate Tools: These tools use the Vector Tools and additional Java tools to help manage the creation and manipulation of spatial surrogates used in emissions modeling.
The Spatial Allocator and associated documentation is available for download from the Community Modeling and Analysis System (CMAS) Center , which is hosted by the Institute for the Environment at the University of North Carolina at Chapel Hill.
Figure 1a. Tree Canapoy Percent.
Figure 1b. Spatial Allocator output from raster tools on North Carolina 1 kilometer grids for fractional tree canopy coverage (1a) and impervious surfaces (1b) from NCLD data.
Contacts: Donna Scwede