# Geodesy

2017-07-27T18:08:25+03:00[Europe/Moscow] en true Clairaut's theorem, Geodetic datum, Gravity anomaly, Indoor positioning system, Real Time Kinematic, Circle of latitude, Frame of reference, Gravitational field, Map, Photogrammetry, Sea level, Topography, Estuary, Geoid, Topographic map, Map projection, Prime meridian, Satellite navigation, Triangulation station, Helmertâ€“Wolf blocking, 3D data acquisition and object reconstruction, Geodetic astronomy, Clairaut's relation flashcards Geodesy
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• Clairaut's theorem
Clairaut's theorem is a general mathematical law applying to spheroids of revolution.
• Geodetic datum
A geodetic datum or geodetic system is a coordinate system, and a set of reference points, used to locate places on the Earth (or similar objects).
• Gravity anomaly
A gravity anomaly is the difference between the observed acceleration of a planet's reaction to gravity and a value predicted from a model.
• Indoor positioning system
An indoor positioning system (IPS) is a system to locate objects or people inside a building using radio waves, magnetic fields, acoustic signals, or other sensory information collected by mobile devices.
• Real Time Kinematic
Real Time Kinematic (RTK) satellite navigation is a technique used to enhance the precision of position data derived from satellite-based positioning systems (global navigation satellite systems, GNSS) such as GPS, GLONASS, Galileo, and BeiDou.
• Circle of latitude
A circle of latitude on the Earth is an imaginary east–west circle connecting all locations (ignoring elevation) with a given latitude.
• Frame of reference
In physics, a frame of reference (or reference frame) consists of an abstract coordinate system and the set of physical reference points that uniquely fix (locate and orient) the coordinate system and standardize measurements.
• Gravitational field
In physics, a gravitational field is a model used to explain the influence that a massive body extends into the space around itself, producing a force on another massive body.
• Map
A map is a symbolic depiction highlighting relationships between elements of some space, such as objects, regions, and themes.
• Photogrammetry
Photogrammetry is the science of making measurements from photographs, especially for recovering the exact positions of surface points.
• Sea level
Sea level is generally used to refer to mean sea level (MSL), an average level for the surface of one or more of Earth's oceans from which heights such as elevations may be measured.
• Topography
Topography is the study of the shape and features of the surface of the Earth and other observable astronomical objects including planets, moons, and asteroids.
• Estuary
An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea.
• Geoid
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.
• Topographic map
In modern mapping, a topographic map is a type of map characterized by large-scale detail and quantitative representation of relief, usually using contour lines, but historically using a variety of methods.
• Map projection
Commonly, a map projection is a systematic transformation of the latitudes and longitudes of locations on the surface of a sphere or an ellipsoid into locations on a plane.
• Prime meridian
A prime meridian is a meridian (a line of longitude) in a geographical coordinate system at which longitude is defined to be 0°.