A geodetic network is a network of triangles which are measured exactly by techniques of terrestrial surveying or by satellite geodesy. It has been suggested that networking be merged into this article or section. ... A triangle is one of the basic shapes of geometry: a two-dimensional figure with three vertices and three sides which are straight line segments. ... Terrestrial literally means of the earth and is used in a variety of contexts: In biology and in the general sense, terrestrial means indicates ground-dwelling (compare aquatic). ... Satellite geodesy is the measurement of the form and dimensions of the Earth, the location of objects on its surface and the figure of the Earths gravity field by means of satellite techniques. ...

In "classical geodesy" (up to the sixties) this is done by triangulation, based on measurements of angles and of some spare distances; the precise orientation to geographic North is done by methodes of geodetic astronomy. The mainly used instruments are theodolites and tacheometers, which nowadays are equipped by infrared distance measuring, data bases, communication systems and partly by satellite links. The ship wants to know the distance d to the shore. ... This article is about angles in geometry. ... Compass rose with north highlighted and at top North is one of the four cardinal directions, specifically the direction that, in Western culture, is treated as the primary direction: north is used (explicitly or implicitly) to define all other directions; the (visual) top edges of maps usually correspond to the... Geodetic astronomy is the application of astronomical methods into networks and technical projects of geodesy. ... Diagram of an Optical Theodolite. ... The tacheometer or tachymeter is a kind of theodolite used for rapid measurments and determines, electronically or electro-optically, the distance to target, and is highly automated in its operations. ... Image of a small dog taken in mid-infrared (thermal) light (false color) Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation. ... A database is an information set with a regular structure. ...

Beginning with ca 1960, the electronic distance measurement (EDM) was introduced, when the first prototypes became small enough to work in the field. EDM increased the network accuracies up to 1:1 million (1 cm per 10 km; today at least 10 times better), and also the economy of surveying. At the same time the geodetic use of satellites begun, e.g. the bright satellites of Echo I and II and Pageos. By means of these space probes, global networks were determined, which later proofed the theory of plate tectonics. Look up Electronic in Wiktionary, the free dictionary Electronic can refer to many things: Objects related to electronics The band Electronic. ... Early day motion Earthquake disaster mitigation Electric dipole moment Electrical discharge machining Electronic dance music Electronic distance meter Electronic document management Engineering design management Engineering drawing management Environmental design and management Department of Essential Drugs and Medicines of the World Health Organization In information technology, EDM stands for Enterprise Decision... Prototypes or prototypical instances combine the most representative attributes of a category. ... In science, engineering, industry and statistics, accuracy is the degree of conformity of a measured or calculated quantity to its actual, nominal, or some other reference, value. ... A satellite is an object that orbits another object (known as its primary). ... Echo I and Echo II designate two classes of Soviet nuclear powered guided missile submarines. ... Plate tectonics (from the Greek word for one who constructs, τεκτων, tekton) is a theory of geology developed to explain the phenomenon of continental drift, and is currently the theory accepted by the vast majority of scientists working in this area. ...

An important improvement was the introduction of radio and electronic satellites like Geos A and B (1965-70), of the Transit system (Doppler effect) 1967-1990 — which was the predecessor of GPS - and of laser techniques like Lageos (USA) or Starlette (F). Despite of the space techniques, small networks for cadastre and technical projects are mainly measured terrestrially, but in many cases closed together to national and global networks by satellite geodesy. The word transit, when used alone, has several possible meanings in English a modern rock band in Dallas, TX - [[]http://www. ... This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... Laser (US Air Force) A LASER (Light Amplification by Stimulated Emission of Radiation) is an optical device which uses a quantum mechanical effect called stimulated emission (discovered by Einstein while researching the photoelectric effect) in order to generate a coherent beam of light from a lasing medium of controlled purity... Cadastre (a French word from the Late Latin capitastrum, a register of the poll-tax) is a register of the real property of a country, with details of the area, the owners and the value. ... A technical is a fighting vehicle. ...

In the meantime, several hundred geodetic satellites are orbiting, supplemented by a huge number of remote sensing satellites - and last but not least by the navigation systems of GPS and Glonass, which will be followed by the European Galileo satellites in 2008. Nowadays the space-based geodetic networks are more flexible and economic than terrestrial ones; the further existence of fixed point networks is already discussed, but will survive al least for administrational and legal demands on local and regional scales. Whereas the worldwide networks can not be defined to be fixed, because Geodynamics is chancing the position of all continents by amounts of 2 cm up to 20 cm per year. Therefore modern global networks like ETRF or ITRF show not only coordinates of their "fixed points", but also their annual velocities. In the broadest sense, remote sensing is the measurement or acquisition of information of an object or phenomenon, by a recording device that is not in physical or intimate contact with the object. ... There are several traditions of navigation. ... Over fifty GPS satellites such as this NAVSTAR have been launched since 1978. ... Galileo can refer to: Galileo Galilei, astronomer, philosopher, and physicist (1564 - 1642) the Galileo spacecraft, a NASA space probe that visited Jupiter and its moons the Galileo positioning system Life of Galileo, a play by Bertolt Brecht Galileo (1975) - screen adaptation of the play Life of Galileo by Bertolt Brecht... Attempting to understand the nature of space has always been a prime occupation for philosophers and scientists. ... In mathematics, a fixed point of a function f is an argument x such that f(x) = x; see fixed point (mathematics). ... The World in Plate Carrée Projection In English, world is rooted in a compound of the obsolete words were, man, and eld, age; thus, its oldest meaning is Age of Man. ... Dymaxion map by Buckminster Fuller shows land mass with minimal distortion as only one continuous continent A continent (Latin continere, to hold together) is a large continuous land mass. ... The International Terrestrial Reference System (ITRS) describes procedures for creating reference frames suitable for use with measurements on or near the Earths surface. ... See Cartesian coordinate system or Coordinates (elementary mathematics) for a more elementary introduction to this topic. ... Velocity (symbol: v) is a vector measurement of the rate and direction of motion. ...

See also

• Cadaster, Survey, maps, national networks
• ED50, GRS80, History of geodesy, Trigonometry