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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 (GDT Transportation Terminals, 1999)

Geographic Data Technology, Inc., Geographic Data Technology, Inc. (GDT), and Environmental Systems Research Institute, Inc. (ESRI). U.S. GDT Transportation Terminals represents locations within United States for transportation terminals such as bus terminals, train stations, mar... Geographic Data Technology, Inc.

3. USA (Major Roads, 2000)

Geographic Data Technology, Inc., Environmental Systems Research Institute, Inc. (ESRI), and Geographic Data Technology, Inc. (GDT). U.S. Major Roads represents interstate, U.S., and state highways and other major thoroughfares within the United States. Geographic Data Technology, Inc.

4. 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.

5. USA (Parks, 2000)

Environmental Systems Research Institute, Inc. (ESRI), National Park Service, Geographic Data Technology, Inc. (GDT), and Geographic Data Technology, Inc. U.S. Parks represents National Parks, National Forests, State and local parks and forests within United States. Geographic Data Technology, Inc.

6. USA (Telephone Area Code Boundaries, 2000)

Geographic Data Technology, Inc. (GDT), Geographic Data Technology, Inc., and Environmental Systems Research Institute, Inc. (ESRI). U.S. Telephone Area Code Boundaries represents the telephone area codes for United States. They are also known as Numbering Plan Areas (NPA). Geographic Data Technology, Inc.