1997. United States. National Imagery and Mapping Agency. This datalayer is a polygon coverage representing large urban areas (built-up areas) worldwide and was published as part of the USGS Global GIS : g... American Geological Institute.
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2016. Hart Energy Publishing. This polygon shapefile represents urban areas in North America (Canada, Mexico, and the United States). Data includes the name of the urban area an... Hart Energy Publishing.
2010. DeLorme Publishing Company and Environmental Systems Research Institute (Redlands, Calif.). World Urban Areas represents the major urban areas of the world. ESRI.
2010. DeLorme (Firm) and Environmental Systems Research Institute (Redlands, Calif.). World Urban Areas represents the major urban areas, with populations greater than 10,000, of the world. Esri.