63 relations: Altitude, Axes conventions, BeiDou Navigation Satellite System, Canada, Cartography, Chart datum, Coordinate system, Cornwall, Datum reference, Earth, ECEF, ED50, Elevation, Ellipsoid, Equator, European Terrestrial Reference System 1989, Figure of the Earth, Galileo (satellite navigation), Geocentric Datum of Australia 1994, Geodesy, Geographic coordinate conversion, Geography of Mars, Geoid, Geologic time scale, Global Positioning System, GLONASS, Great Britain, GRS 80, International Earth Rotation and Reference Systems Service, International Terrestrial Reference System, Latitude, Longitude, Map, Map projection, Mars, Meades Ranch Triangulation Station, National Geospatial-Intelligence Agency, Nautical chart, Navigation, Newlyn, Normal (geometry), North America, North American Datum, North American Vertical Datum of 1988, North Pole, Ocean, Ordnance datum, Ordnance Survey, Ordnance Survey National Grid, PZ-90, ..., Quebec, Reference ellipsoid, Satellite navigation, Scuba diving, Sea level, South Pole, Spherical harmonics, Surveying, Tide, True north, United States Department of Defense, World Geodetic System, 2011 Tōhoku earthquake and tsunami. Expand index (13 more) » « Shrink index
Altitude or height (sometimes known as depth) is defined based on the context in which it is used (aviation, geometry, geographical survey, sport, atmospheric pressure, and many more).
In ballistics and flight dynamics, axes conventions are standardized ways of establishing the location and orientation of coordinate axes for use as a frame of reference.
The BeiDou Navigation Satellite System (BDS) is a Chinese satellite navigation system.
Canada is a country located in the northern part of North America.
Cartography (from Greek χάρτης chartēs, "papyrus, sheet of paper, map"; and γράφειν graphein, "write") is the study and practice of making maps.
A chart datum is the level of water that charted depths displayed on a nautical chart are measured from.
In geometry, a coordinate system is a system which uses one or more numbers, or coordinates, to uniquely determine the position of the points or other geometric elements on a manifold such as Euclidean space.
Cornwall (Kernow) is a county in South West England in the United Kingdom.
A datum reference or just datum is some important part of an object—such as a point, line, plane, hole, set of holes, or pair of surfaces—that serves as a reference in defining the geometry of the object and (often) in measuring aspects of the actual geometry to assess how closely they match with the nominal value, which may be an ideal, standard, average, or desired value.
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
ECEF ("earth-centered, earth-fixed"), also known as ECR ("earth-centered rotational"), is a geographic coordinate system and Cartesian coordinate system, and is sometimes known as a "conventional terrestrial" system.
ED50 ("European Datum 1950") is a geodetic datum which was defined after World War II for the international connection of geodetic networks.
The elevation of a geographic location is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface (see Geodetic datum § Vertical datum).
An ellipsoid is a surface that may be obtained from a sphere by deforming it by means of directional scalings, or more generally, of an affine transformation.
An equator of a rotating spheroid (such as a planet) is its zeroth circle of latitude (parallel).
The European Terrestrial Reference System 1989 (ETRS89) is an ECEF (Earth-Centered, Earth-Fixed) geodetic Cartesian reference frame, in which the Eurasian Plate as a whole is static.
The figure of the Earth is the size and shape of the Earth in geodesy.
Galileo is the global navigation satellite system (GNSS) that is being created by the European Union (EU) through the European Space Agency (ESA), headquartered in Prague in the Czech Republic, with two ground operations centres, Oberpfaffenhofen near Munich in Germany and Fucino in Italy.
The Geocentric Datum of Australia 1994 (GDA94) is a geodetic datum covering the Australian continent.
Geodesy, also known as geodetics, is the earth science of accurately measuring and understanding three of Earth's fundamental properties: its geometric shape, orientation in space, and gravitational field.
In geodesy, conversion among different geographic coordinate systems is made necessary by the different geographic coordinate systems in use across the world and over time.
The geography of Mars, also known as areography, entails the delineation and characterization of regions on Mars.
The geoid is the shape that the surface of the oceans would take under the influence of Earth's gravity and rotation alone, in the absence of other influences such as winds and tides.
The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time.
The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Air Force.
GLONASS (ГЛОНАСС,; Глобальная навигационная спутниковая система; transliteration), or "Global Navigation Satellite System", is a space-based satellite navigation system operating in the radionavigation-satellite service.
Great Britain, also known as Britain, is a large island in the north Atlantic Ocean off the northwest coast of continental Europe.
GRS 80, or Geodetic Reference System 1980, is a geodetic reference system consisting of a global reference ellipsoid and a gravity field model.
The International Earth Rotation and Reference Systems Service (IERS), formerly the International Earth Rotation Service, is the body responsible for maintaining global time and reference frame standards, notably through its Earth Orientation Parameter (EOP) and International Celestial Reference System (ICRS) groups.
The International Terrestrial Reference System (ITRS) describes procedures for creating reference frames suitable for use with measurements on or near the Earth's surface.
In geography, latitude is a geographic coordinate that specifies the north–south position of a point on the Earth's surface.
Longitude, is a geographic coordinate that specifies the east-west position of a point on the Earth's surface.
A map is a symbolic depiction emphasizing relationships between elements of some space, such as objects, regions, or themes.
A map projection is a systematic transformation of the latitudes and longitudes of locations from the surface of a sphere or an ellipsoid into locations on a plane.
Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.
The Meades Ranch Triangulation Station is a survey marker in Osborne County in the state of Kansas in the Midwestern United States.
The National Geospatial-Intelligence Agency (NGA) is both a combat support agency under the United States Department of Defense and an intelligence agency of the United States Intelligence Community, with the primary mission of collecting, analyzing, and distributing geospatial intelligence (GEOINT) in support of national security.
A nautical chart is a graphic representation of a maritime area and adjacent coastal regions.
Navigation is a field of study that focuses on the process of monitoring and controlling the movement of a craft or vehicle from one place to another.
Newlyn (Lulyn: Lu 'fleet', Lynn/Lydn 'pool') is a seaside town and fishing port in south-west Cornwall, UK.
In geometry, a normal is an object such as a line or vector that is perpendicular to a given object.
North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere; it is also considered by some to be a northern subcontinent of the Americas.
The North American Datum (NAD) is the datum now used to define the geodetic network in North America.
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.
The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is (subject to the caveats explained below) defined as the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface.
An ocean (the sea of classical antiquity) is a body of saline water that composes much of a planet's hydrosphere.
In the British Isles, an ordnance datum or OD is a vertical datum used by an ordnance survey as the basis for deriving altitudes on maps.
Ordnance Survey (OS) is a national mapping agency in the United Kingdom which covers the island of Great Britain.
The Ordnance Survey National Grid reference system is a system of geographic grid references used in Great Britain, distinct from latitude and longitude.
PZ-90, short for (Параметры Земли 1990 года, Parametry Zemli 1990 goda) is a geodetic datum defined for use in the GLONASS system.
Quebec (Québec)According to the Canadian government, Québec (with the acute accent) is the official name in French and Quebec (without the accent) is the province's official name in English; the name is.
In geodesy, a reference ellipsoid is a mathematically defined surface that approximates the geoid, the truer figure of the Earth, or other planetary body.
A satellite navigation or satnav system is a system that uses satellites to provide autonomous geo-spatial positioning.
Scuba diving is a mode of underwater diving where the diver uses a self-contained underwater breathing apparatus (scuba) which is completely independent of surface supply, to breathe underwater.
Mean sea level (MSL) (often shortened to sea level) is an average level of the surface of one or more of Earth's oceans from which heights such as elevations may be measured.
The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is one of the two points where the Earth's axis of rotation intersects its surface.
In mathematics and physical science, spherical harmonics are special functions defined on the surface of a sphere.
Surveying or land surveying is the technique, profession, and science of determining the terrestrial or three-dimensional positions of points and the distances and angles between them.
Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of Earth.
True north (also called geodetic north) is the direction along Earth's surface towards the geographic North Pole.
The Department of Defense (DoD, USDOD, or DOD) is an executive branch department of the federal government of the United States charged with coordinating and supervising all agencies and functions of the government concerned directly with national security and the United States Armed Forces.
The World Geodetic System (WGS) is a standard for use in cartography, geodesy, and satellite navigation including GPS.
The was a magnitude 9.0–9.1 (Mw) undersea megathrust earthquake off the coast of Japan that occurred at 14:46 JST (05:46 UTC) on Friday 11 March 2011, with the epicentre approximately east of the Oshika Peninsula of Tōhoku and the hypocenter at an underwater depth of approximately.
Datum (geodesy), East North Up, Geodectic Datum, Geodesic datum, Geodetic Coordinate System, Geodetic origin, Geodetic reference system, Geodetic system, Geographic datum, Map datum, Reference height, Vertical datum.