Search results
Results from the WOW.Com Content Network
Originally known as Sea Level Datum of 1929, NGVD 29 was determined and published by the United States Coast and Geodetic Survey [2] and used to measure the elevation of a point above and depression below mean sea level (MSL).
If an elevation is converted to NAVD 88 a citation linking to the source of the original NGVD 29 elevation should be provided, as well as the method of conversion. Usage The elevation of [[Mount Whitney]] is {{convert|14505|ft}}{{NGVD29}} → The elevation of Mount Whitney is 14,495 feet (4,418 m) NGVD 29
It superseded the National Geodetic Vertical Datum of 1929 (NGVD 29), [2] previously known as the Sea Level Datum of 1929. NAVD 88, along with North American Datum of 1983 (NAD 83), is set to be replaced in 2025 with a new geometric reference frame and geopotential datum, based on GPS and gravimetric geoid models. [3]
NGVD 29: Sea Level Datum 1929: OSGB36: Ordnance Survey Great Britain 1936: SK-42: ... The conversion to meters uses Clarke's 1865 inch-meter ratio of 39.370432.
VERTCON is a computer program that computes the modeled difference in orthometric height between the North American Vertical Datum of 1988 (NAVD 88) and the National Geodetic Vertical Datum of 1929 (NGVD 29) for a location in the contiguous United States. [1] The parameters required are the latitude and longitude of the location.
This template creates a bottom note which explains that VERTCON, an online orthometric height conversion tool, was used to calculate the NAVD 88 elevation from the NGVD 29 elevation. Ref tags are generated by the template and so must not be added by the editor.
NGVD 29: Sea Level Datum 1929: OSGB36: Ordnance Survey Great Britain 1936: SK-42: Systema Koordinat 1942 goda: ED50: European Datum 1950: SAD69: South American Datum 1969: GRS 80: Geodetic Reference System 1980: ISO 6709: Geographic point coord. 1983: NAD 83: North American Datum 1983: WGS 84: World Geodetic System 1984: NAVD 88: N. American ...
All elevations in this article include an elevation adjustment from the National Geodetic Vertical Datum of 1929 (NGVD 29) to the North American Vertical Datum of 1988 (NAVD 88). For further information, please see this United States National Geodetic Survey note.