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The National Geodetic Vertical Datum of 1929 is the official name since 1973 [1] of the vertical datum established for vertical control surveying in the United States of America by the General Adjustment of 1929.
Mar 19, 2015 · Historically, the standard datum used by the federal government was the National Geodetic Vertical Datum of 1929 (NGVD 29). However, the North American Vertical Datum of 1988 (NAVD 88) is now the national standard. There are also many other different vertical datums available.
Jul 12, 2018 · The Sea Level Datum of 1929 was named the National Geodetic Vertical Datum of 1929 on May 10, 1973. (Geodetic Glossary, pp. 57) The Sea Level Datum of 1929 is a vertical control datum in the United States by the general adjustment of 1929.
Jul 12, 2018 · What are NGVD 29 and NAVD 88? How do the horizontal datums differ? Which should I use? The Sea Level Datum of 1929 was named the National Geodetic Vertical Datum of 1929 on May 10, 1973.
A vertical datum is a base measurement point (or set of points) from which elevations are determined. Historically, the standard datum used by the Federal government was the National Geodetic Vertical Datum of 1929 (NGVD 29). However, the North American Vertical Datum of 1988 (NAVD 88) is now the national standard.
NGVD 29 is the abbreviation for the National Geodetic Vertical Datum of 1929, the predecessor to NAVD 88. Due to the advancement of technology and surveying methods, the increased amount of available data and the level of accuracy of that data led to the new datum.
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Oct 12, 2010 · The first geodetic leveling project in the United States was surveyed by the Coast Survey from 1856 to 1857. General adjustments of leveling data yielded datums in 1900, 1903, 1907, and 1912. NGS does not offer products which transform from these older datums into newer ones (though some users still work in them!)
