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Geographic Data Technology, Inc. (GDT)
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Colorado
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1. Colorado Block Groups 2002
2002. Geographic Data Technology, Inc. (GDT). Colorado Block Groups represents the U.S. Census block groups of Colorado. Environmental Systems Research Institute, Inc. (ESRI).
2. Colorado Tracts 2002
2002. Geographic Data Technology, Inc. (GDT). Colorado Tracts represents the U.S. Census tracts and block numbering areas (BNA) of Colorado. Environmental Systems Research Institute, Inc. (ESRI).
3. Colorado ZIP Code Areas 2002
2001. Geographic Data Technology, Inc. (GDT). Colorado ZIP Code Areas represents five-digit ZIP Code areas used by the U.S. Postal Service to deliver mail more effectively. The first digit of ... Environmental Systems Research Institute, Inc. (ESRI).
4. Colorado Major Roads 2002
1999. Geographic Data Technology, Inc. (GDT). Colorado Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Colorado. Environmental Systems Research Institute, Inc. (ESRI).
5. Colorado Rivers 2002
1997. Geographic Data Technology, Inc. (GDT). Colorado Rivers represents streams and rivers within Colorado. Environmental Systems Research Institute, Inc. (ESRI).