geodetic survey marker |
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| navigate by keyword : 1951 america american arrow azimuth bench benchmark coast colorado coordinates elevation geodesy geodetic geology ground information lincoln location mapping mark marker metal mount mountain national navigation ngs old orientation point position positioning precision reference spatial states summit survey surveying system topographic topography triangulation united usa usgs |
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| Close-up of a USGS geodetic survey marker, part of the National Spatial Reference System, on Mount Lincoln at the summit of Hoosier Pass, Colorado, USA. |
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