2000. American Geological Institute, Geological Survey (U.S.), and Environmental Systems Research Institute (Redlands, Calif.). This shapefile includes arcs and polygons that describe U.S. Geological Survey defined geologic provinces of the World. Each province has a set of ... American Geological Institute.
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2000. Environmental Systems Research Institute (Redlands, Calif.), Geological Survey (U.S), and American Geological Institute. This datalayer is a point coverage representing cities worldwide and was produced by ESRI and published as part of the USGS Global GIS database. It... American Geological Institute.