Geologic Mapping of Tunnels Using Photogrammetry--Camera and Target Positioning: Usgs Open-File Report 90-49 by Keld S. Dueholm, Jeffrey A. Coe

Geologic Mapping of Tunnels Using Photogrammetry--Camera and Target Positioning: Usgs Open-File Report 90-49

Keld S. Dueholm, Jeffrey A. Coe

22 pages • missing pub info (editions)

nonfiction politics challenging informative reflective medium-paced
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The United States Geological Survey (USGS) is a scientific organization created in 1879, and is part of the U.S. government. Their scientists explore our environment and ecosystems, to determine the natural dangers we are facing. The agency has ov...

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