2000. Geographic Data Technology, Inc. (GDT) and Environmental Systems Research Institute, Inc. (ESRI). United States Designated Market Areas is a polygon theme representing groups of surrounding counties or split counties (by five-digit ZIP) in which... Environmental Systems Research Institute, Inc. (ESRI).
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2002. Environmental Systems Research Institute, Inc. (ESRI). World Administrative Units 2002 is a polygon theme representing the boundaries for the first-level administrative units of the world, as they exist... Environmental Systems Research Institute, Inc. (ESRI).
2000. Environmental Systems Research Institute, Inc. (ESRI). World Cities is a point theme representing cities throughout the world. Environmental Systems Research Institute, Inc. (ESRI).
1999. World Wildlife Fund and Environmental Systems Research Institute, Inc. (ESRI). World Wildlife Fund Ecoregions represents global terrestrial and freshwater ecoregions defined as relatively large areas of land or water in the wo... Environmental Systems Research Institute, Inc. (ESRI).