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Hace 3 días · The new datum, called the North American Vertical Datum of 1988 (NAVD 88), was defined through the leveling network and is the official vertical datum for civilian surveying and mapping activities in the United States performed or financed by the Federal Government.
Hace 5 días · The North American Datum of 1983 (NAD 83) is a unified horizontal or geometric datum and successor to NAD27 providing a spatial reference for Canada and the United States. NAD83 corrects some of the distortions from NAD27 over distance by using a more dense set of positions from terrestrial and Doppler satellite data.
Hace 3 días · 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 Vertical Datum 1988: ETRS89: European Terrestrial Ref. Sys. 1989: GCJ-02: Chinese obfuscated datum 2002: Geo ...
Hace 5 días · North American Vertical Datum of 1988 (NAVD 88): This is the official vertical datum of the United States. It replaced the older National Geodetic Vertical Datum of 1929 (NGVD 29) and is used to determine elevation or height.
- Gladys Moran
Hace 5 días · – Examples of horizontal datums include the North American Datum of 1983 (NAD83) and the World Geodetic System of 1984 (WGS84). Examples of vertical datums include the North American Vertical Datum of 1988 (NAVD88) and mean sea level (MSL).
Hace 5 días · The North American Datum of 1983 (NAD83) is the most current datum in North America. It provides latitude and longitude and some height information using the reference ellipsoid GRS80. NAD83 corrects some of the distortions from NAD27 over distance by using a more dense set of positions from terrestrial and Doppler satellite data.
Hace 5 días · The most commonly used geographic coordinate system is the World Geodetic System 1984 (WGS 84). In the field of GPS, the Global Positioning System uses the World Geodetic System 1984 (WGS 84) as its earth-centered datum. WGS 84 was adopted as a world standard from the North American Datum of 1983 (NAD 83).
