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Leveling
Topographic instructions of the United States geological survey
2E1-2E5
Geodetic leveling by the U.S. Geological Survey provides a framework of accurate elevations for topographic mapping. Elevations are referred to the Sea Level Datum of 1929. Lines of leveling may be run either with automatic or with precise spirit levels, by either the center-wire or the three-wire method. For future use, the surveys are monumented with bench marks, using standard metal tablets or other marking devices. The elevations are adjusted by least squares or other suitable method and are published in lists of control.
Suggested Citation
U.S. Geological Survey, 1966, Leveling: Topographic instructions of the United States geological survey 2E1-2E5, viii, 63 p., https://doi.org/10.3133/70045432.
Publication type
Report
Publication Subtype
USGS Unnumbered Series
Title
Leveling
Series title
Topographic instructions of the United States geological survey