• Thumbnail for Geodetic Reference System 1980
    The Geodetic Reference System 1980 (GRS80) consists of a global reference ellipsoid and a normal gravity model. The GRS80 gravity model has been followed...
    7 KB (1,078 words) - 12:07, 24 August 2024
  • Thumbnail for Geodetic datum
    geodetic datum or geodetic system (also: geodetic reference datum, geodetic reference system, or geodetic reference frame, or terrestrial reference frame)...
    32 KB (3,376 words) - 19:59, 18 February 2025
  • Thumbnail for Hellenic Geodetic Reference System 1987
    The Hellenic Geodetic Reference System 1987 or HGRS87 (Greek: Ελληνικό Γεωδαιτικό Σύστημα Αναφοράς 1987 or ΕΓΣΑ'87) is a geodetic system commonly used...
    7 KB (827 words) - 10:33, 27 October 2024
  • Thumbnail for Spatial reference system
    national grid reference system, Britain Lambert-93 (fr), the official projection in Metropolitan France Hellenic Geodetic Reference System 1987, Greece...
    15 KB (1,570 words) - 00:35, 6 September 2024
  • Thumbnail for EPSG Geodetic Parameter Dataset
    EPSG Geodetic Parameter Dataset (also EPSG registry) is a public registry of geodetic datums, spatial reference systems, Earth ellipsoids, coordinate transformations...
    5 KB (444 words) - 20:42, 28 January 2025
  • Thumbnail for Military Grid Reference System
    The Military Grid Reference System (MGRS) is the geocoordinate standard used by NATO militaries for locating points on Earth. The MGRS is derived from...
    15 KB (2,140 words) - 08:57, 12 November 2024
  • Thumbnail for World Geodetic System
    The World Geodetic System (WGS) is a standard used in cartography, geodesy, and satellite navigation including GPS. The current version, WGS 84, defines...
    24 KB (2,842 words) - 14:17, 18 January 2025
  • Thumbnail for European Terrestrial Reference System 1989
    The European Terrestrial Reference System 1989 (ETRS89) is an ECEF (Earth-Centered, Earth-Fixed) geodetic Cartesian reference frame, in which the Eurasian...
    6 KB (615 words) - 01:28, 16 December 2024
  • Thumbnail for Geodesy
    Geodesy (redirect from Geodetics)
    simplest terms, the degree of central concentration of mass. The 1980 Geodetic Reference System (GRS 80), adopted at the XVII General Assembly of the International...
    40 KB (4,385 words) - 18:37, 6 February 2025
  • Thumbnail for Projected coordinate system
    coordinate system – also called a projected coordinate reference system, planar coordinate system, or grid reference system – is a type of spatial reference system...
    21 KB (2,805 words) - 11:47, 25 December 2024
  • Thumbnail for Earth-centered, Earth-fixed coordinate system
    reference system, ECEF consists of an abstract coordinate system (in this case, a conventional three-dimensional right-handed system), and a geodetic...
    9 KB (912 words) - 16:39, 14 December 2024
  • Thumbnail for Earth ellipsoid
    Australia for the Australian Geodetic Datum and in the South American Datum 1969. The GRS-80 (Geodetic Reference System 1980) as approved and adopted by...
    24 KB (2,829 words) - 04:48, 16 February 2025
  • Thumbnail for Geographic coordinate system
    A geographic coordinate system (GCS) is a spherical or geodetic coordinate system for measuring and communicating positions directly on Earth as latitude...
    23 KB (2,513 words) - 05:30, 26 February 2025
  • Thumbnail for Universal Transverse Mercator coordinate system
    Ellipsoid was used. The World Geodetic System WGS84 ellipsoid is now generally used to model the Earth in the UTM coordinate system, which means current UTM...
    18 KB (2,852 words) - 19:52, 18 February 2025
  • Thumbnail for Indian Regional Navigation Satellite System
    Indian Regional Navigation Satellite System (IRNSS), with an operational name of NavIC (acronym for Navigation with Indian Constellation; also, nāvik 'sailor'...
    64 KB (5,276 words) - 19:13, 25 February 2025
  • Thumbnail for National Spatial Reference System
    The National Spatial Reference System (NSRS), managed by the National Geodetic Survey (NGS), is a coordinate system that includes latitude, longitude,...
    6 KB (574 words) - 21:36, 8 February 2025
  • Thumbnail for Earth radius
    Earth radius (category Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference)
    Properties". arXiv:1510.07674 [astro-ph.SR]. Moritz, H. (1980). Geodetic Reference System 1980 Archived 2016-02-20 at the Wayback Machine, by resolution...
    41 KB (4,432 words) - 20:34, 21 February 2025
  • Thumbnail for Global Positioning System
    Pokémon Go. Reference frames: realization and densification of the terrestrial reference frames in the framework of Global Geodetic Observing System. Co-location...
    183 KB (18,911 words) - 18:43, 22 February 2025
  • Thumbnail for Satellite geodesy
    motion. The 1990s were focused on the development of permanent geodetic networks and reference frames.: 7  Dedicated satellites were launched to measure Earth's...
    21 KB (2,338 words) - 10:15, 25 November 2024
  • Thumbnail for Irish grid reference system
    The Irish grid reference system is a system of geographic grid references used for paper mapping in Ireland (both Northern Ireland and the Republic of...
    7 KB (753 words) - 17:04, 28 July 2024
  • Thumbnail for Geoid
    Geoid (redirect from Reference geoid)
    position, the height of the geoid (e.g., the EGM96 geoid) over the World Geodetic System (WGS) ellipsoid. They are then able to correct the height above the...
    29 KB (3,445 words) - 22:18, 8 January 2025
  • Thumbnail for Global Area Reference System
    The Global Area Reference System (GARS) is a standardized geospatial reference system developed by the National Geospatial-Intelligence Agency (NGA) for...
    3 KB (470 words) - 12:54, 13 December 2022
  • Thumbnail for Physical geodesy
    Physical geodesy (category Articles needing additional references from October 2021)
    poids; valeur conventionnelle de gn. Moritz, Helmut (2000). "Geodetic Reference System 1980". Journal of Geodesy. 74 (1): 128–133. doi:10.1007/s001900050278...
    6 KB (1,403 words) - 09:42, 22 September 2024
  • Thumbnail for Gravity of Earth
    Gravity of Earth (category Articles needing additional references from September 2024)
    1970. If the terrain is at sea level, we can estimate, for the Geodetic Reference System 1980, g { ϕ } {\displaystyle g\{\phi \}} , the acceleration at latitude...
    31 KB (3,808 words) - 11:49, 12 February 2025
  • Thumbnail for Wide Area Augmentation System
    Augmentation System (WAAS) is an air navigation aid developed by the Federal Aviation Administration to augment the Global Positioning System (GPS), with...
    42 KB (4,012 words) - 07:05, 30 January 2025
  • Thumbnail for National Geodetic Vertical Datum of 1929
    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...
    4 KB (397 words) - 03:19, 4 February 2025
  • Thumbnail for BeiDou
    Navigation Satellite System (BDS; Chinese: 北斗卫星导航系统; pinyin: běidǒu wèixīng dǎoháng xìtǒng) is a satellite-based radio navigation system owned and operated...
    67 KB (5,801 words) - 19:34, 22 February 2025
  • Thumbnail for Geodynamics
    response to average stress. Experts in geodynamics commonly use data from geodetic GPS, InSAR, and seismology, along with numerical models, to study the evolution...
    14 KB (1,791 words) - 15:17, 8 February 2024
  • Geopotential (category Articles needing additional references from July 2014)
    revolution called the reference ellipsoid. The currently most widely used reference ellipsoid, that of the Geodetic Reference System 1980 (GRS80), approximates...
    12 KB (1,681 words) - 20:05, 9 August 2024
  • Thumbnail for Figure of the Earth
    reference ellipsoid for Earth is small, only about one part in 300. Historically, flattening was computed from grade measurements. Nowadays, geodetic...
    25 KB (2,927 words) - 04:41, 19 February 2025