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- North_American_Vertical_Datum_of_1988 abstract "The North American Vertical Datum of 1988 (NAVD 88) is the vertical control datum of orthometric height established for vertical control surveying in the United States of America based upon the General Adjustment of the North American Datum of 1988.NAVD 88 was established in 1991 by the minimum-constraint adjustment of geodetic leveling observations in Canada, the United States, and Mexico. It held fixed the height of the primary tidal bench mark, referenced to the International Great Lakes Datum of 1985 local mean sea level height value, at Rimouski, Quebec, Canada. Additional tidal bench mark elevations were not used due to the demonstrated variations in sea surface topography, i.e., that mean sea level is not the same equipotential surface at all tidal bench marks.The definition of NAVD 88 uses the Helmert orthometric height, which calculates the location of the geoid (which approximates sea level) from modeled local gravity. The NAVD 88 model is based on then-available measurements, and remains fixed despite later improved geoid models.NAVD 88 replaced the National Geodetic Vertical Datum of 1929 (NGVD 29), previously known as the Sea Level Datum of 1929. The elevation difference between points in a local area will show negligible change from one datum to the other, even though the elevation of both does change. NGVD 29 used a simple model of gravity based on latitude to calculate the geoid and did not take into account other variations. Thus, the elevation difference for points across the country does change between datums.".
- North_American_Vertical_Datum_of_1988 wikiPageExternalLink www.ngs.noaa.gov.
- North_American_Vertical_Datum_of_1988 wikiPageExternalLink NGS_Glossary.xml.
- North_American_Vertical_Datum_of_1988 wikiPageExternalLink vert_con.prl.
- North_American_Vertical_Datum_of_1988 wikiPageExternalLink www.usgs.gov.
- North_American_Vertical_Datum_of_1988 wikiPageID "12103386".
- North_American_Vertical_Datum_of_1988 wikiPageLength "2517".
- North_American_Vertical_Datum_of_1988 wikiPageOutDegree "27".
- North_American_Vertical_Datum_of_1988 wikiPageRevisionID "682622246".
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Altitude.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Canada.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Category:Geodesic_datums.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Category:Surveying.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Category:Topography.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Datum_(geodesy).
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Elevation.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Geodesy.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Geodetic_datum.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Geoid.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Mexico.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink NGVD_29.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink National_Geodetic_Vertical_Datum_of_1929.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Orthometric_height.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Quebec.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Reference_ellipsoid.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Rimouski.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Sea_Level_Datum_of_1929.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Surveying.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Topographic_elevation.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink Topography.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink U.S._National_Geodetic_Survey.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLink United_States.
- North_American_Vertical_Datum_of_1988 wikiPageWikiLinkText "NAVD 88".
- North_American_Vertical_Datum_of_1988 wikiPageWikiLinkText "NAVD88".
- North_American_Vertical_Datum_of_1988 wikiPageWikiLinkText "NGVD".
- North_American_Vertical_Datum_of_1988 wikiPageWikiLinkText "North American Vertical Datum of 1988".
- North_American_Vertical_Datum_of_1988 hasPhotoCollection North_American_Vertical_Datum_of_1988.
- North_American_Vertical_Datum_of_1988 wikiPageUsesTemplate Template:Cite_web.
- North_American_Vertical_Datum_of_1988 wikiPageUsesTemplate Template:Geodesy.
- North_American_Vertical_Datum_of_1988 subject Category:Geodesic_datums.
- North_American_Vertical_Datum_of_1988 subject Category:Surveying.
- North_American_Vertical_Datum_of_1988 subject Category:Topography.
- North_American_Vertical_Datum_of_1988 hypernym Datum.
- North_American_Vertical_Datum_of_1988 comment "The North American Vertical Datum of 1988 (NAVD 88) is the vertical control datum of orthometric height established for vertical control surveying in the United States of America based upon the General Adjustment of the North American Datum of 1988.NAVD 88 was established in 1991 by the minimum-constraint adjustment of geodetic leveling observations in Canada, the United States, and Mexico.".
- North_American_Vertical_Datum_of_1988 label "North American Vertical Datum of 1988".
- North_American_Vertical_Datum_of_1988 sameAs Datum_Tegak_Amerika_Utara_1988.
- North_American_Vertical_Datum_of_1988 sameAs m.02vpzbc.
- North_American_Vertical_Datum_of_1988 sameAs North_American_Vertical_Datum_of_1988.
- North_American_Vertical_Datum_of_1988 sameAs Q7053896.
- North_American_Vertical_Datum_of_1988 sameAs Q7053896.
- North_American_Vertical_Datum_of_1988 wasDerivedFrom North_American_Vertical_Datum_of_1988?oldid=682622246.
- North_American_Vertical_Datum_of_1988 isPrimaryTopicOf North_American_Vertical_Datum_of_1988.