2003. USGS National Center for EROS. The North America Shaded Relief data were derived from the GTOPO30 elevation data. GTOPO30 is a global digital elevation model (DEM) with a horizon... National Atlas of the United States.
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2003. Environmental Systems Research Institute (Redlands, Calif.). U.S. 108th Congressional Districts represents an interim version of the political boundaries for the U.S. 108th Congressional Districts. The U.S. C... ESRI.
2003. Environmental Systems Research Institute (Redlands, Calif.). This dataset is a polyline coverage representing the Bailey Equal-Area Grid. The Bailey Equal-Area Grid is an area-reference grid that uses meridia... American Geological Association.
2003. EROS Data Center, Geological Survey (U.S), American Geological Institute, and Environmental Systems Research Institute (Redlands, Calif.). This datalayer is a polygon coverage representing hydrologic drainage basins located worldwide. The data displayed here is derived from the HYDRO 1... American Geological Institute.
2003. United States. National Geospatial-Intelligence Agency, Geological Survey (U.S.), American Geological Institute, and Environmental Systems Research Institute (Redlands, Calif.). This datalayer is a point coverage representing a gazetteer of non-populated place features located between the Greenwich meridian (0 degrees) and ... American Geological Institute.
2003. United States. National Geospatial-Intelligence Agency, Geological Survey (U.S.), American Geological Institute, and Environmental Systems Research Institute (Redlands, Calif.). This datalayer is a point coverage representing a gazetteer of populated place features located between the Greenwich meridian (0 degrees) and 180 ... American Geological Institute.
2003. American Geological Institute, Geological Survey (U.S.), and Environmental Systems Research Institute (Redlands, Calif.). This datalayer is a polygon coverage showing U.S. Geological Survey defined geologic provinces of the World, excluding the United States. It was pu... American Geological Institute.
2003. American Geological Institute, Geological Survey (U.S.), and Environmental Systems Research Institute (Redlands, Calif.). This dataset is a polyline coverage representing a 5-degree by 5-degree global latitude and longitude grid, including geographically significant li... American Geological Institute.
2003. Wolf, Aaron T., Natharius, Jeffrey A., Danielson, Jeffrey J., Ward, Brian S., Pender, Jan K., American Geological Institute, and Geological Survey (U.S). This datalayer is a polygon coverage representing the Transboundary Freshwater Dispute Database dataset: international river basins of the world. T... American Geological Institute.
2003. Geological Survey (U.S.), American Geological Institute, and Geological Survey (U.S.). National Mapping Division. This datalayer is point coverage gazetteer representing populated places in the United States and its territories. It contains official names and l... American Geological Institute.