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