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Geographic Data Technology, Inc. (GDT)
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Alaska
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1. Alaska Block Groups 2002
2002. Geographic Data Technology, Inc. (GDT). Alaska Block Groups represents the U.S. Census block groups of Alaska. Environmental Systems Research Institute, Inc. (ESRI).
2. Alaska Tracts 2002
2002. Geographic Data Technology, Inc. (GDT). Alaska Tracts represents the U.S. Census tracts and block numbering areas (BNA) of Alaska. Environmental Systems Research Institute, Inc. (ESRI).