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- Geodetic_datum abstract "Geodetic systems or geodetic data are used in geodesy, navigation, surveying by cartographers and satellite navigation systems to translate positions indicated on the products to their real position on earth. The systems are needed because the earth is an imperfect ellipsoid.A datum (plural datums) is a set of values used to define a specific geodetic system. The difference in co-ordinates between datums is commonly referred to as datum shift. The datum shift between two particular datums can vary from one place to another within one country or region, and can be anything from zero to hundreds of meters (or several kilometers for some remote islands). The North Pole, South Pole and Equator may be assumed to be in different positions on different datums, so True North may be very slightly different. Different datums use different estimates for the precise shape and size of the Earth (reference ellipsoids).Because the Earth is an imperfect ellipsoid, localised datums can give a more accurate representation of the area of coverage than the global WGS 84 datum. OSGB36, for example, is a better approximation to the geoid covering the British Isles than the global WGS 84 ellipsoid.[citation needed] However, as the benefits of a global system outweigh the greater accuracy, the global WGS 84 datum is becoming increasingly adopted.A geodetic datum (plural datums, not data) is a reference from which measurements are made. In surveying and geodesy, a datum is a set of reference points on the Earth's surface against which position measurements are made and (often) an associated model of the shape of the Earth (reference ellipsoid) to define a geodetic coordinate system. Horizontal datums are used for describing a point on the Earth's surface, in latitude and longitude or another coordinate system. Vertical datums measure elevations or depths. In engineering and drafting, a datum is a reference point, surface, or axis on an object against which measurements are made.".
- Geodetic_datum thumbnail Chicago_City_Datum.jpg?width=300.
- Geodetic_datum wikiPageExternalLink tr8350_2.html.
- Geodetic_datum wikiPageExternalLink geographiclib.sourceforge.net.
- Geodetic_datum wikiPageExternalLink kartoweb.itc.nl.
- Geodetic_datum wikiPageExternalLink body.htm.
- Geodetic_datum wikiPageExternalLink datum.html.
- Geodetic_datum wikiPageExternalLink elist.html.
- Geodetic_datum wikiPageExternalLink gps_f.html.
- Geodetic_datum wikiPageExternalLink index.html.
- Geodetic_datum wikiPageExternalLink 15285-geodetic-toolbox.
- Geodetic_datum wikiPageExternalLink www.ngs.noaa.gov.
- Geodetic_datum wikiPageExternalLink Nadcon.html.
- Geodetic_datum wikiPageExternalLink WhatDatum.
- Geodetic_datum wikiPageExternalLink www.ordnancesurvey.co.uk.
- Geodetic_datum wikiPageExternalLink www.ordsvy.gov.uk.
- Geodetic_datum wikiPageExternalLink index.htm.
- Geodetic_datum wikiPageID "995417".
- Geodetic_datum wikiPageRevisionID "606805716".
- Geodetic_datum hasPhotoCollection Geodetic_datum.
- Geodetic_datum subject Category:Cartography.
- Geodetic_datum subject Category:Coordinate_systems.
- Geodetic_datum subject Category:Geodesic_datums.
- Geodetic_datum subject Category:Geodesy.
- Geodetic_datum subject Category:Global_Positioning_System.
- Geodetic_datum subject Category:Navigation.
- Geodetic_datum subject Category:Surveying.
- Geodetic_datum comment "Geodetic systems or geodetic data are used in geodesy, navigation, surveying by cartographers and satellite navigation systems to translate positions indicated on the products to their real position on earth. The systems are needed because the earth is an imperfect ellipsoid.A datum (plural datums) is a set of values used to define a specific geodetic system. The difference in co-ordinates between datums is commonly referred to as datum shift.".
- Geodetic_datum label "Datum geodetico".
- Geodetic_datum label "Datum".
- Geodetic_datum label "Datum".
- Geodetic_datum label "Geodetic datum".
- Geodetic_datum label "Geodetisch datum".
- Geodetic_datum label "Geodätisches Datum".
- Geodetic_datum label "Système géodésique".
- Geodetic_datum label "Датум".
- Geodetic_datum label "المسند الجيوديسي".
- Geodetic_datum label "测量基准".
- Geodetic_datum label "測地系".
- Geodetic_datum sameAs Geodätisches_Datum.
- Geodetic_datum sameAs Datum.
- Geodetic_datum sameAs Système_géodésique.
- Geodetic_datum sameAs Datum_geodetico.
- Geodetic_datum sameAs 測地系.
- Geodetic_datum sameAs Geodetisch_datum.
- Geodetic_datum sameAs Datum.
- Geodetic_datum sameAs m.03xnhv.
- Geodetic_datum sameAs Q1502887.
- Geodetic_datum sameAs Q1502887.
- Geodetic_datum wasDerivedFrom Geodetic_datum?oldid=606805716.
- Geodetic_datum depiction Chicago_City_Datum.jpg.
- Geodetic_datum isPrimaryTopicOf Geodetic_datum.