USGS Multimedia Gallery
Title: USGS Topographers at Work
Description: A USGS topographer works with a leveling instrument. The umbrella prevents temperature fluctuations that could affect the leveling bubble in his instrument. The man on the ground is recording elevation data.
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.
USGS Western Region Science Information and Library Services
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