USGS topographer Don Winstead working with a level in Hawaii.
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National Geospatial Program images.
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USGS Topographers at Work
USGS topographer Don Winstead working with a level in Hawaii.
USGS Topographer at Work
USGS topographer Russ Curtis using a Wild N3 level.
USGS topographer Russ Curtis using a Wild N3 level.
USGS Topographer at Work
Topographer Jim Tennant making measurements with a Wild T-2 theodolite on Mount Trumball in Arizona.
Topographer Jim Tennant making measurements with a Wild T-2 theodolite on Mount Trumball in Arizona.