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- Sea_Level_Datum_of_1929 abstract "The Sea Level Datum of 1929 was the vertical control datum established for vertical control surveying in the United States of America by the General Adjustment of 1929. The datum was used to measure elevation (altitude) above, and depression (depth) below, mean sea level (MSL).Mean sea level was measured at 26 tide gauges: 21 in the United States and 5 in Canada. The datum was defined by the observed heights of mean sea level at the 26 tide gauges and by the set of elevations of all bench marks resulting from the adjustment. The adjustment required a total of 66,315 miles (106,724 km) of leveling with 246 closed circuits and 25 circuits at sea level.Since the Sea Level Datum of 1929 was a hybrid model, it was not a pure model of mean sea level, the geoid, or any other equipotential surface. Therefore, it was renamed the National Geodetic Vertical Datum of 1929 (NGVD 29) in 1973. NGVD29 was superseded by the North American Vertical Datum of 1988 (NAVD 88), based upon an equipotential definition and a readjustment, although many cities and U.S. Army Corps of Engineers projects with established data continued to use the older datum.".
- Sea_Level_Datum_of_1929 wikiPageExternalLink www.ngs.noaa.gov.
- Sea_Level_Datum_of_1929 wikiPageExternalLink NGS_Glossary.xml.
- Sea_Level_Datum_of_1929 wikiPageExternalLink vert_con.prl.
- Sea_Level_Datum_of_1929 wikiPageExternalLink www.usgs.gov.
- Sea_Level_Datum_of_1929 wikiPageID "12103375".
- Sea_Level_Datum_of_1929 wikiPageLength "2280".
- Sea_Level_Datum_of_1929 wikiPageOutDegree "32".
- Sea_Level_Datum_of_1929 wikiPageRevisionID "682622050".
- Sea_Level_Datum_of_1929 wikiPageWikiLink Altitude.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Canada.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Category:1929_in_the_United_States.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Category:Cartography.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Category:Geodesic_datums.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Category:Surveying.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Category:Topography.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Depression_(geology).
- Sea_Level_Datum_of_1929 wikiPageWikiLink Elevation.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Equipotential.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Geodesy.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Geodetic_datum.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Geoid.
- Sea_Level_Datum_of_1929 wikiPageWikiLink North_American_Vertical_Datum_of_1988.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Reference_ellipsoid.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Sea_level.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Storm_surge.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Surveying.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Topography.
- Sea_Level_Datum_of_1929 wikiPageWikiLink U.S._National_Geodetic_Survey.
- Sea_Level_Datum_of_1929 wikiPageWikiLink United_States.
- Sea_Level_Datum_of_1929 wikiPageWikiLink United_States_Army_Corps_of_Engineers.
- Sea_Level_Datum_of_1929 wikiPageWikiLink Wikt:depth.
- Sea_Level_Datum_of_1929 wikiPageWikiLinkText "NAVD29".
- Sea_Level_Datum_of_1929 wikiPageWikiLinkText "NGVD 29".
- Sea_Level_Datum_of_1929 wikiPageWikiLinkText "NGVD".
- Sea_Level_Datum_of_1929 wikiPageWikiLinkText "NGVD 29".
- Sea_Level_Datum_of_1929 wikiPageWikiLinkText "NGVD29".
- Sea_Level_Datum_of_1929 wikiPageWikiLinkText "National Geodetic Vertical Datum".
- Sea_Level_Datum_of_1929 wikiPageWikiLinkText "Sea Level Datum of 1929".
- Sea_Level_Datum_of_1929 wikiPageWikiLinkText "vertical control".
- Sea_Level_Datum_of_1929 wikiPageUsesTemplate Template:Cite_web.
- Sea_Level_Datum_of_1929 wikiPageUsesTemplate Template:Geodesy.
- Sea_Level_Datum_of_1929 subject Category:1929_in_the_United_States.
- Sea_Level_Datum_of_1929 subject Category:Cartography.
- Sea_Level_Datum_of_1929 subject Category:Geodesic_datums.
- Sea_Level_Datum_of_1929 subject Category:Surveying.
- Sea_Level_Datum_of_1929 subject Category:Topography.
- Sea_Level_Datum_of_1929 hypernym Datum.
- Sea_Level_Datum_of_1929 type Geophysic.
- Sea_Level_Datum_of_1929 type Infographic.
- Sea_Level_Datum_of_1929 type Science.
- Sea_Level_Datum_of_1929 comment "The Sea Level Datum of 1929 was the vertical control datum established for vertical control surveying in the United States of America by the General Adjustment of 1929. The datum was used to measure elevation (altitude) above, and depression (depth) below, mean sea level (MSL).Mean sea level was measured at 26 tide gauges: 21 in the United States and 5 in Canada.".
- Sea_Level_Datum_of_1929 label "Sea Level Datum of 1929".
- Sea_Level_Datum_of_1929 sameAs Q7325529.
- Sea_Level_Datum_of_1929 sameAs Datum_Aras_Laut_1929.
- Sea_Level_Datum_of_1929 sameAs m.02vpz9p.
- Sea_Level_Datum_of_1929 sameAs Q7325529.
- Sea_Level_Datum_of_1929 wasDerivedFrom Sea_Level_Datum_of_1929?oldid=682622050.
- Sea_Level_Datum_of_1929 isPrimaryTopicOf Sea_Level_Datum_of_1929.