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Federal
TIGER/Line Shapefile, 2018, nation, U.S., Current County and Equivalent National Shapefile
U.S. Census Bureau, Department of Commerce —
The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master... -
Federal
Circum-Arctic Resource Appraisal (north of the Arctic Circle) Assessment Units
Department of the Interior —
The Assessment Unit is the fundamental unit used in the World Petroleum Resources Project. The Assessment Unit is defined within the context of the higher-level Total... -
Federal
Geologic Provinces of the Circum-Arctic, 2008 (north of the Arctic Circle)
Department of the Interior —
This shapefile includes arcs and polygons that describe U.S. Geological Survey defined 33 geologic provinces of the Circum-Arctic (north of the Arctic Circle). Each...