USGS Multimedia Gallery
Title: USGS Cartographer at Work
Description: Bill Campbell operates an Electrical Survey Net Adjuster (ESNA). The ESNA was used for the adjustment of levels and traverse.
Location: Sacramento, CA, USA
Date Taken: Jan 1 1957
Usage: This image is public domain/of free use unless otherwise stated. Please refer to the USGS Copyright section for how to credit the photo.
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