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Historical map overlays

USGS scanned historical topographic maps. Enable an overlay and adjust its opacity. Works in 2D and 3D.

Sun azimuth: 315°   Sun altitude: 45°   Z factor: 1   Lidar opacity: 1
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Topknot of North America Region Gold Locations

Gold Mining Site AK • Topknot of North America Region, Alaska County
Description
The Arctic slope of Alaska lies within the Polar Zone, some 600 miles east and west by 150 miles north and south, sloping from the foothills of the brooks Range to the Arctic Ocean. This area is know mostly for the great oil discoveries at Prudhoe Bay. Very little prospecting has been done due to climatic conditions.
Historical Notes
Source: Tom Ashworth's Prospectors Cache (tomashworth.com / Tom Ashworth). Author: Tom Ashworth. Original page: topnot_north_america_ak.shtml. Map coordinates are an approximate region/district centroid — not a precise claim site. The Arctic slope of Alaska lies within the Polar Zone, some 600 miles east and west by 150 miles north and south, sloping from the foothills of the brooks Range to the Arctic Ocean. This area is know mostly for the great oil discoveries at Prudhoe Bay. Very little prospecting has been done due to climatic conditions.
Status / Verification historical_site — Legendary or approximate

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