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Federal
Polygons of global undersea features for geographic searches
Department of the Interior —
A shapefile of 311 undersea features from all major oceans and seas has been created as an aid for retrieving georeferenced information resources. Version 1.1 of the... -
Federal
Data release for the geologic map of the upper Arkansas River valley region, north-central Colorado
Department of the Interior —
This 1:50,000-scale geologic map represents a compilation of the most recent geologic studies of the upper Arkansas River valley, between Leadville and Salida,...