Data Gateway:
Geospatial Data Gateway – Natural Resources Conservation Service (NRCS)
Location/Orientation:
Digital Raster Graph (DRG) – U.S. Geological Survey (USGS)
Digital Orthophoto Quadrangle (DOQ) – U.S. Geological Survey (USGS)
Climate:
Climate Generator (CLIGEN) – Agricultural Research Service (ARS)
Parameter-elevation Regressions on Independent Slopes Model (PRISM) – Oregon State University
Topography:
Digital Elevation Model (DEM) – U.S. Geological Survey (USGS)
Geographical Coordinates and Elevation – Precision Farming with Global Positioning System (GPS)
Soils:
Soil Survey Geographic (SSURGO) Database – Natural Resources Conservation Service (NRCS)
Land use/Land cover:
Land Cover Characterization Program (LCCP) – U.S. Geological Survey (USGS)
Cropland Data Layer – National Agricultural Statistics Service (NASS)