simply sequences of symbols that may be further interpreted formally. A datum is an individual value in a collection of data. Data are usually organized...

standards, also includes a choice of geodetic datum (including an Earth ellipsoid), as different datums will yield different latitude and longitude values...

A datum reference or just datum (plural: datums) is some important part of an object—such as a point, line, plane, hole, set of holes, or pair of surfaces—that...

In geodesy, surveying, hydrography and navigation, vertical datum or altimetric datum is a reference coordinate surface used for vertical positions, such...

A geodetic datum or geodetic system (also: geodetic reference datum, geodetic reference system, or geodetic reference frame, or terrestrial reference frame)...

referenced to the same geodetic datum. A geographic coordinate transformation is a translation among different geodetic datums. Both geographic coordinate...

An ordnance datum (OD) is a vertical datum used by an ordnance survey as the basis for deriving altitudes on maps. A spot height may be expressed as above...

heights. A chart datum is generally derived from some tidal phase, in which case it is also known as a tidal datum. Common chart datums are lowest astronomical...

the large geodetic systems, such as European Datum (ED50), North American Datum (NAD), and Tokyo Datum (TD), to provide a worldwide geo-data basis Need...

Look up datum in Wiktionary, the free dictionary. Datum is, from its Latin origin, a singular form of "data", and may refer to a single item of data....

The North American Vertical Datum of 1988 (NAVD 88) is the vertical datum for orthometric heights established for vertical control surveying in the United...

required. A datum is a theoretically exact plane, line, point, or axis.: 3  A datum feature is a physical feature of a part identified by a datum feature...

specified datum. The datum features are identified on the skin model from the datum component in the dash separated list of nominal datum appearing in...

square to the north of 49 is N40, etc. The grid is based on the OSGB36 datum (Ordnance Survey Great Britain 1936, based on the Airy 1830 ellipsoid),...

reference to a common assumed vertical datum. It is a vertical distance between survey point and adopted datum surface. Thus, it is considered as the...

global MSL is a type of vertical datum – a standardised geodetic datum – that is used, for example, as a chart datum in cartography and marine navigation...

sea level as an equipotential gravitational surface (see Geodetic datum § Vertical datum). The term elevation is mainly used when referring to points on...

American Datum of 1983 (NAD 83) and the North American Vertical Datum of 1988 (NAVD 88) with a new geometric reference frame and geopotential datum. In association...

The North American Datum (NAD) is the horizontal datum now used to define the geodetic network in North America. A datum is a formal description of the...

ED50 ("European Datum 1950", EPSG:4230) is a geodetic datum which was defined after World War II for the international connection of geodetic networks...

In mathematical group theory, the root datum of a connected split reductive algebraic group over a field is a generalization of a root system that determines...

applying space geodesy and terrestrial geodetic techniques, and relying on datums and coordinate systems. Geodetic job titles include geodesist and geodetic...

The Geocentric Datum of Australia 1994 (GDA94) is a geodetic datum covering the Australian continent. Details of this datum are provided by the GDA94 Technical...

The National Geodetic Vertical Datum of 1929 is the official name since 1973 of the vertical datum established for vertical control surveying in the United...

datums such as NAD 83 may also be used. Due to differences between datums, the ECEF coordinates for a location will be different for different datums...

Omne datum optimum (Latin for "Every perfect gift", a quotation from the Epistle of James 1:17) was a papal bull issued by Pope Innocent II on 29 March...

Kavala (Greek: Καβάλα, Kavála [kaˈvala]) is a city in northern Greece, the principal seaport of eastern Macedonia and the capital of Kavala regional unit...

The Luzon Datum of 1911 was the base for the first modern survey of the Philippine Islands. The execution of the triangulation of the Philippine Islands...

The Australian Height Datum was introduced in 1971 as the official vertical datum for Australia, and thereby serves as the benchmark to which all height...

moon of Neptune. A planetary datum is a generalization of geodetic datums for other planetary bodies, such as the Mars datum; it requires the specification...