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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.

Location: USA

Photographer: , U.S. Geological Survey

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.

Source:

USGS Western Region Science Information and Library Services

File Details:
Type: JPEG image - 2.73 MB
Dimensions: 2265 x 2798
Resolution: 300 dpi

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Tags: Instrument Map cartographic cartography historical level maps survey surveying surveyors topographic topography