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Federal
Declass 3 (2013) = USGS Subset of Hexagon Missions - KH-9: 1971 - 1984
Department of the Interior —
'Keyhole (KH) satellite systems- KH-9 acquired photographs of the Earth\'s surface with a telescopic camera system and transported the exposed film through the use of... -
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...