A. Administrative Organizations that Promote Shared Data

1. Arizona Geographic Information Council
      Public Information Site
2. Center for Earth and Planetary Studies, Smithsonian Institution
   LANDSAT Images of the U.S.A. - Archive
3. Arizona Land Resource Information System
4. Bureau of Land Management Geospatial Information Center
      MetaData and WWW Mapping Home Page, directory of sites and information from the BLM
5. Census Bureau
      GIS Gateway, with connections to many (GIS) resources available on the Internet
6. Federal Geographic Data Committee
7. Global Land Biosphere Data and Resources LANDSAT images
8. National Institute of Statistics, Geography, and Informatics
9. New Mexico Geographic Information Systems Advisory Council
10. National Spatial Data Infrastructure Clearinghouse
11. New Mexico Geographic Information Council
12. Southern Arizona Geographic Informations Systems Consortium
13. Texas Natural Resources Information System GIS Access Page sorted by Federal, State, Border, Local, and Data A-Z.
14. Texas GIS Planning Council
15. University of Arizona Geographic Information Systems Users Group
16. USGS, Biological Resources Division Cooperative GIS Data Services Program

B. Boundaries

1. Arizona Land Resource Information System
2. Census Bureau
      TIGER System, The Coast to Coast Digital Map Database
3. Environmental Protection Agency, Geographic Information Systems Tools
4. Federal Geographic Data Committee
5. Maricopa County's GIS Catalog
6. National Spatial Data Infrastructure Clearinghouse
7. New Mexico Resource Geographic Information System (RGIS)
8. Phoenix at Your Fingertips - GIS Data Catalog
9. Texas Coastal Natural Resource Inventory Program
10. Texas Natural Resources Conservation Commission
11. Texas Natural Resources Information System GIS Access Page sorted by Federal, State, Border, Local, and Data A-Z.
12. Texas Parks and Wildlife Department Geographic Information Systems Lab
13. Texas Wetland Information Network (WETNET)

C. Census Bureau Data

1. Arizona Land Resource Information System
2. Census Bureau
      TIGER System, The Coast to Coast Digital Map Database
3. Environmental Protection Agency, Geographic Information Systems Tools
4. Federal Geographic Data Committee
5. Maricopa County's GIS Catalog
6. National Spatial Data Infrastructure Clearinghouse
7. New Mexico Resource Geographic Information System (RGIS)
8. North Central Texas Council of Governments
9. Texas Natural Resources Information System GIS Access Page sorted by Federal, State, Border, Local, and Data A-Z.North Central Texas Council of Governments

D. Climate

1. Arizona Land Resource Information System
2. Environmental Protection Agency, Geographic Information Systems Tools
3. Federal Geographic Data Committee
4. Maricopa County's GIS Catalog
5. National Spatial Data Infrastructure Clearinghouse
6. New Mexico Resource Geographic Information System (RGIS)
7. Texas Coastal Natural Resource Inventory Program
8. Texas Natural Resources Conservation Commission
9. Texas Natural Resources Information System GIS Access Page sorted by Federal, State, Border, Local, and Data A-Z

E. Features and Places

1. Arizona Land Resource Information System
2. Environmental Protection Agency, Geographic Information Systems Tools
3. Federal Geographic Data Committee
4. Maricopa County's GIS Catalog
5. National Imagery and Mapping Agency
6. National Spatial Data Infrastructure Clearinghouse
7. New Mexico Resource Geographic Information System (RGIS)
8. Phoenix at Your Fingertips - GIS Data Catalog
9. Texas Coastal Natural Resource Inventory Program
10. Texas Natural Resources Information System GIS Access Page sorted by Federal, State, Border, Local, and Data A-Z.
11. Texas Parks and Wildlife Department Geographic Information Systems Lab
12. Texas Wetland Information Network (WETNET)

F. Geology

1. Arizona Land Resource Information System
2. Environmental Protection Agency, Geographic Information Systems Tools
3. Federal Geographic Data Committee
4. Maricopa County's GIS Catalog
5. National Spatial Data Infrastructure Clearinghouse
6. New Mexico Resource Geographic Information System (RGIS)
7. Oklahoma Geological Survey gopher menu.
8. Texas Coastal Natural Resource Inventory Program
9. Texas Natural Resources Information System GIS Access Page sorted by Federal, State, Border, Local, and Data A-Z

G. Hydrography

1. Arizona Land Resource Information System
2. Census Bureau
      TIGER System, The Coast to Coast Digital Map Database
3. Environmental Protection Agency, Geographic Information Systems Tools
4. Federal Geographic Data Committee
5. National Spatial Data Infrastructure Clearinghouse
6. New Mexico Resource Geographic Information System (RGIS)
7. Phoenix at Your Fingertips - GIS Data Catalog
8. Texas Coastal Natural Resource Inventory Program
9. Texas Natural Resources Information System GIS Access Page sorted by Federal, State, Border, Local, and Data A-Z

H. Land Ownership

1. Arizona Land Resource Information System
2. Bureau of Land Management Geographic Coordinate Data Base public land survey geographic coordinates files
3. Environmental Protection Agency, Geographic Information Systems Tools
4. Federal Geographic Data Committee
5. National Spatial Data Infrastructure Clearinghouse
6. New Mexico Resource Geographic Information System (RGIS)
7. Texas Natural Resources Information System GIS Access Page sorted by Federal, State, Border, Local, and Data A-Z

I. Land Use / Land Cover

1. Arizona Land Resource Information System
2. Environmental Protection Agency, Geographic Information Systems Tools
3. Federal Geographic Data Committee
4. Maricopa County's GIS Catalog
5. National Spatial Data Infrastructure Clearinghouse
6. New Mexico Resource Geographic Information System (RGIS)
7. North Central Texas Council of Governments
8. Phoenix at Your Fingertips - GIS Data Catalog
9. Texas Coastal Natural Resource Inventory Program
10. Texas Natural Resources Conservation Commission
11. Texas Natural Resources Information System GIS Access Page sorted by Federal, State, Border, Local, and Data A-Z.
12. Texas Parks and Wildlife Department Geographic Information Systems Lab

J. Remote Sensing Imagery

1. Arizona Land Resource Information System
2. Center for Earth and Planetary Studies: Sources of Earth and Planetary Photography
3. National Imagery and Mapping Agency
4. Environmental Protection Agency, Geographic Information Systems Tools
5. Federal Geographic Data Committee
6. National Spatial Data Infrastructure Clearinghouse
7. New Mexico Resource Geographic Information System (RGIS)
8. North Central Texas Council of Governments

K. Soils

1. Arizona Land Resource Information System
2. Federal Geographic Data Committee
3. Maricopa County's GIS Catalog
4. National Spatial Data Infrastructure Clearinghouse
5. New Mexico Resource Geographic Information System (RGIS)
6. Soil Survey Geographic Database and FTP Site
7. Texas Natural Resources Information System GIS Access Page sorted by Federal, State, Border, Local, and Data A-Z

L. Species Distribution

1. Federal Geographic Data Committee
2. Maricopa County's GIS Catalog
3. National Spatial Data Infrastructure Clearinghouse
4. New Mexico Resource Geographic Information System (RGIS)
5. Texas Coastal Natural Resource Inventory Program

M. Topography

1. Arizona Land Resource Information System
2. Environmental Protection Agency, Geographic Information Systems Tools
3. Federal Geographic Data Committee
4. Maricopa County's GIS Catalog
5. National Imagery and Mapping Agency
6. National Spatial Data Infrastructure Clearinghouse
7. New Mexico Resource Geographic Information System (RGIS)
8. Texas Natural Resources Conservation Commission
9. Texas Natural Resources Information System GIS Access Page sorted by Federal, State, Border, Local, and Data A-Z

N. Transportation

1. Arizona Land Resource Information System
2. Census Bureau
      TIGER System, The Coast-to-Coast Digital Map Database
3. Environmental Protection Agency, Geographic Information Systems Tools
4. Federal Geographic Data Committee
5. Maricopa County's GIS Catalog
6. National Spatial Data Infrastructure Clearinghouse
7. New Mexico Resource Geographic Information System (RGIS)
8. North Central Texas Council of Governments
9. Phoenix at Your Fingertips - GIS Data Catalog
10. Texas Coastal Natural Resource Inventory Program
11. Texas Natural Resources Information System GIS Access Page sorted by Federal, State, Border, Local, and Data A-Z

O. Vegetation

1. Arizona Land Resource Information System
2. Environmental Protection Agency, Geographic Information Systems Tools
3. Federal Geographic Data Committee
4. Maricopa County's GIS Catalog
5. National Spatial Data Infrastructure Clearinghouse
6. New Mexico Resource Geographic Information System (RGIS)
7. Texas Natural Resources Information System GIS Access Page sorted by Federal, State, Border, Local, and Data A-Z.
8. Texas Parks and Wildlife Department Geographic Information Systems Lab
9. The USGS-NPS Vegetation Mapping Program

P. Wetlands

1. Arizona Land Resource Information System
2. Environmental Protection Agency, Geographic Information Systems Tools
3. Federal Geographic Data Committee
4. National Spatial Data Infrastructure Clearinghouse
5. Texas Wetland Information Network (WETNET)
6. U.S. Fish and Wildlife Service National Wetlands Inventory