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- Geodetic_network abstract "A geodetic network (also: reference or controlnetwork) is a network of triangles which are measured exactly by techniques of terrestrial surveying or by satellite geodesy.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 the geographic north is achieved through methods of geodetic astronomy. The principal instruments used are theodolites and tacheometers, which nowadays are equipped with infrared distance measuring, data bases, communication systems and partly by satellite links.Electronic distance measurement (EDM) was introduced around 1960, when the prototype instruments became small enough to be used in the field. EDM increased network accuracies up to 1:1 million (1 cm per 10 km; today at least 10 times better), and made surveying less costly. The geodetic use of satellites began around the same time. By using bright satellites like Echo I, Echo II and Pageos, global networks were determined, which later provided support for the theory of plate tectonics.Another 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 the use of spacecraft, small networks for cadastral and technical projects are mainly measured terrestrially, but in many cases incorporated in national and global networks by satellite geodesy.Nowadays, several hundred geodetic satellites are in orbit, supplemented by a large number of remote sensing satellites and navigation systems like GPS and Glonass, which will be followed by the European Galileo satellites in 2013. While these developments have made satellite-based geodetic network surveying more flexible and cost effective than its terrestrial equivalent, the continued existence of fixed point networks is still needed for administrative and legal purposes on local and regional scales. Global geodetic networks cannot be defined to be fixed, since geodynamics are continuously changing the position of all continents by 2 to 20 cm per year. Therefore modern global networks like ETRS89 or ITRF show not only coordinates of their \"fixed points\", but also their annual velocities.".
- Geodetic_network wikiPageID "2043284".
- Geodetic_network wikiPageLength "2987".
- Geodetic_network wikiPageOutDegree "47".
- Geodetic_network wikiPageRevisionID "678106095".
- Geodetic_network wikiPageWikiLink Accuracy_and_precision.
- Geodetic_network wikiPageWikiLink Angle.
- Geodetic_network wikiPageWikiLink Benchmark_(surveying).
- Geodetic_network wikiPageWikiLink Cadastre.
- Geodetic_network wikiPageWikiLink Category:Geodesy.
- Geodetic_network wikiPageWikiLink Continent.
- Geodetic_network wikiPageWikiLink Coordinate_system.
- Geodetic_network wikiPageWikiLink Database.
- Geodetic_network wikiPageWikiLink Doppler_effect.
- Geodetic_network wikiPageWikiLink ED50.
- Geodetic_network wikiPageWikiLink Electronics.
- Geodetic_network wikiPageWikiLink European_Terrestrial_Reference_System_1989.
- Geodetic_network wikiPageWikiLink GEOS.
- Geodetic_network wikiPageWikiLink GLONASS.
- Geodetic_network wikiPageWikiLink GRS_80.
- Geodetic_network wikiPageWikiLink Galileo_(satellite_navigation).
- Geodetic_network wikiPageWikiLink Geodetic_astronomy.
- Geodetic_network wikiPageWikiLink Geodynamics.
- Geodetic_network wikiPageWikiLink Global_Positioning_System.
- Geodetic_network wikiPageWikiLink History_of_geodesy.
- Geodetic_network wikiPageWikiLink Infrared.
- Geodetic_network wikiPageWikiLink International_Terrestrial_Reference_System.
- Geodetic_network wikiPageWikiLink Lageos.
- Geodetic_network wikiPageWikiLink Laser.
- Geodetic_network wikiPageWikiLink Map.
- Geodetic_network wikiPageWikiLink Navigation.
- Geodetic_network wikiPageWikiLink PAGEOS.
- Geodetic_network wikiPageWikiLink Plate_tectonics.
- Geodetic_network wikiPageWikiLink Project_Echo.
- Geodetic_network wikiPageWikiLink Prototype.
- Geodetic_network wikiPageWikiLink Radio.
- Geodetic_network wikiPageWikiLink Remote_sensing.
- Geodetic_network wikiPageWikiLink Satellite.
- Geodetic_network wikiPageWikiLink Satellite_geodesy.
- Geodetic_network wikiPageWikiLink Starlette.
- Geodetic_network wikiPageWikiLink Surveying.
- Geodetic_network wikiPageWikiLink Tachymeter_(survey).
- Geodetic_network wikiPageWikiLink Technology.
- Geodetic_network wikiPageWikiLink Theodolite.
- Geodetic_network wikiPageWikiLink Transit_(satellite).
- Geodetic_network wikiPageWikiLink Triangle.
- Geodetic_network wikiPageWikiLink Triangulation.
- Geodetic_network wikiPageWikiLink Trigonometry.
- Geodetic_network wikiPageWikiLink True_north.
- Geodetic_network wikiPageWikiLink Velocity.
- Geodetic_network wikiPageWikiLinkText "Geodetic Network".
- Geodetic_network wikiPageWikiLinkText "Geodetic network".
- Geodetic_network wikiPageWikiLinkText "geodetic network".
- Geodetic_network wikiPageWikiLinkText "network of satellite geodesy".
- Geodetic_network wikiPageUsesTemplate Template:Merge.
- Geodetic_network wikiPageUsesTemplate Template:Unreferenced.
- Geodetic_network subject Category:Geodesy.
- Geodetic_network hypernym Network.
- Geodetic_network type Broadcaster.
- Geodetic_network type Geophysic.
- Geodetic_network comment "A geodetic network (also: reference or controlnetwork) is a network of triangles which are measured exactly by techniques of terrestrial surveying or by satellite geodesy.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 the geographic north is achieved through methods of geodetic astronomy.".
- Geodetic_network label "Geodetic network".
- Geodetic_network sameAs Q4175911.
- Geodetic_network sameAs 측지망.
- Geodetic_network sameAs Rede_geodésica.
- Geodetic_network sameAs m.06h3r2.
- Geodetic_network sameAs Geodetická_sieť.
- Geodetic_network sameAs Geodetiskt_stomnät.
- Geodetic_network sameAs Геодезична_мережа.
- Geodetic_network sameAs Q4175911.
- Geodetic_network wasDerivedFrom Geodetic_network?oldid=678106095.
- Geodetic_network isPrimaryTopicOf Geodetic_network.