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1. USA (Designated Market Areas, 2000)

Environmental Systems Research Institute, Inc. (ESRI), Geographic Data Technology, Inc. (GDT), and Geographic Data Technology, Inc. A U.S. Designated Market Area (DMA) is generally the group of surrounding counties or split counties (by five-digit ZIP) in which metropolitan cent... Geographic Data Technology, Inc.

2. USA (Metropolitan Statistical Areas, 2000)

Environmental Systems Research Institute, Inc. (ESRI), Geographic Data Technology, Inc. (GDT), and Geographic Data Technology, Inc. U.S. Metropolitan Statistical Areas represents geographic entities, defined by the United States Office of Management and Budget for use by Federal... Geographic Data Technology, Inc.