Geodesy: A field of engineering science that is concerned with the determination of the size and shape of the Earth and its gravity field together with their variation over time. Today many of the fundamentals of geodesy are accomplished using advanced space techniques such as the Global Positioning System (GPS), Satellite Laser Ranging (SLR) and Very Long Baseline Interferometry (VLBI). These techniques are capable of measuring distances of some thousands of kilometres to an accuracy of a few millimetres.

          Geodesy is the basis of any mapping aids projects including navigating in the sea , air and land. Areas of its applications cover global problems such as monitoring vertical and horizontal movements of the earth, measuring change in sea level due to the 'greenhouse effect', measuring variations in the rotation axis and rate of rotation of the Earth, to more local problems from measuring the micromovements of bridges, dams and other structures, to the real-time alignment of roads and railway tracks.

            Contents

          • Basics and Reference
          • Collections of Links
          • Coordinate Systems
          • Precise Geodesy with GPS
          • Space/Satellite Geodesy


          Basics and Reference

          • Geodetic surveying 1940-1990
            A look at the history of Geodetic Surveying in the USA, by Joseph F. Dracup. Coast and Geodetic Survey (Retired)

          • Tables of Contents in Geodesy
          • Journal of Geodesy
          • Canadian Space Geodesy Forum

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          Collections of Links

          • WWW-Links GIS, Geodesy, Cartography
            By Stefan A. Voser. Mainly links for University and Government Institutes in Austria, Germany and Switzerland, but also links of
            Cartography in UniversitiesWorldwide
            GIS in UniversitiesWorldwide
          • Geodesy-related sites. A Comprehensive list of sites compiled by O.E. Andersen and published in the 1996 edition of the Geodesist's Handbook.
          • WHOW Astronomy Tours WHOW - Web Helpers On Wheels, automated viewing of SELECTED ASTRONOMY WEB PAGES. While listen to MUSIC surf sites featuring amateur astronomy, observatory, astrophysics, nasa, space, or 100+ tours.

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          Precise Geodesy with GPS

          • International GPS Service for Geodynamics (IGS)
            • IGS Data Center (JPL)
            • IGS Regional GPS Data Center (NOAA)

          • Southern California Integrated GPS Networks
          • Daily GPS Time Series
          • University NAVSTAR Consortium (UNAVCO)
          • NOAA & USNO, National Earth Orientation Service
          • CDDIS - Crustal Dynamics Data Information System (CDDIS)
          • NASA's Space Geodesy program

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          Coordinate Systems

          • Tο Παγκόσμιο Γεωδαιτικό Σύστημα Aναφοράς
            (World Geodetic System 1984)             και το Eλληνικό Γεωδαιτικό Σύστημα Aναφοράς 1987 (EΓΣA '87)

          • The World Geodetic System 1984
          • WGS 84 and Datums Overview . A page with a series of links to information developed by the National Imagery and Mapping Agency (formerly the Defense Mapping Agency) on both horizontal and vertical datums.
          • International Terrestrial Reference Frames (ITRF)
          • The GPS Continuously Operating Reference Stations (CORS) Program by the National Geodetic Survey. With information on the transformation between NAD83 and ITRF - the International Terrestrial Reference Frame of the Earth Rotation Service (IERS).
          • Glonass (SGS85) to GPS (WGS84) Transformation. Based on a paper from Manuscripta Geodetica, Vol. 19, 1994 by P.Misra, R. Abbot & E. Bayliss, all from MIT Lincoln Laboratory.

          • Geodetic Datum Overview in the Geographer's Craft Project by Peter Dana, University of Texas.
          • Datums, Coordinate Systems and Projections
          • Geodetic Datum Parameter Library
            A collection Of European Geodetic Datums, links to other Datum-Sites and Map Projection Parameters, by S. Voser, Federal Armed Forces University, Munich.
          • Geodesy Parameters compiled by the European Petroleum Survey Group (EPSG). A comprehensive set of parameters for projections systems throughtout the world. Ellipsoid parameters are found in the file ELLIPS.CVS while map projection parameters are in PROJ.CSV. Read the READ_ME.TXT for a description of the files. Very useful data set. See also The European Petroleum Survey Group (EPSG) web page.

          • The European Reference Frame (EUREF)

            • IAG Commission X Subcommission for Europe
            • EUREF Permanent Network Information System
            • CERCO

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          Space/Satellite Geodesy

          • National Aeronautics and Space Administration - NASA
            • Ames Research Center
            • Earth Observing System Program (EOS)
            • JPL Data Distribution Laboratory
            • JPL Imaging Radar Home Page
            • JPL Physical Oceanography Distributed Active Archive Center
            • Public Use of Remote Sensing Data (RSD) Program
            • NASA Online Educational Resources
          • ESOC Near-Earth Navigation & Geodesy Section
            The Operations Center of the European Space Agency located in Darmstadt, Germany.
          • TOPEX/POSEIDON
            Ocean Topography From TOPEX/POSEIDON Altimetry measurements.
          • US Military Satellite Mapping and Geodesy

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          | Geodesy and Precise Surveying | Satellite Remote Sensing | Photogrammetry and Vision Systems | Geographic Information Systems (GIS) | Management of Spatial Information |