Geodetic Internet Links
Geodetical Models
- Nederlandse Geometrische Infrastructuur (RDNAP)
- European Coordinate Reference Systems (CRS)
- European Vertical Reference System (EVRS)
- US Geological Survey Map Projections
- Wolfram MathWorld Map Projections
- Interactive Album of Map Projections
Wikipedia Encyclopedia
- Wikipedia Map Projection
- Wikipedia Geodetic Datum
- Wikipedia Reference Ellipsoid
- Wikipedia Geoid Surface
- Wikipedia Plate Tectonics
Geodetical Tools
- GPS, UTC, and TAI Clocks
- On-Line Geodesy Resources
- NGS On-Line Geodetic Tool Kit
- Geoscience Australia Geodesy & GNS
- OGC Geography Markup Language (GML)
- ISO 19136 Geography Markup Language (GML)
- ISO/IEC 18026 Spatial Reference Model (SRM)
- Open Source Geospatial Foundation (OSGeo)
- Cartographic Projections Library (PROJ.4)
- Geospatial Data Abstraction Library (GDAL)
- MSP GEOTRANS (Geographic Translator)
Organizations
- International Association of Geodesy (IAG)
- International Terrestrial Reference Frame (ITRF)
- International Earth Rotation Service (IERS)
- International GNSS Service (IGS)
- International Service for the Geoid (ISG)
- International Centre for Global Earth Models (ICGEM)
- International Federation of Surveyors (FIG)
- Open Geospatial Consortium (OGC)
- IOGP Geomatics Committee (EPSG & GIGS)
- US Coast Guard Navigation Information Center
- US National Geospatial-Intelligence Agency
- US NOAA's National Geodetic Survey (NGS)
Navigation Systems
- GPS World - The Almanac
Orbit Data and Resources on Active GNSS Satellites - Global Navigation Satellite System GPS (U.S. Government)
- Global Navigation Satellite System GLONASS [ГЛОНАСС]
- Global Navigation Satellite System BeiDou (BDS) [ 北斗卫星导航系统 ]
- Global Navigation Satellite System Galileo (GSA) Galileo (ESA) Galileo (EC)
- Indian Regional Navigational Satellite System (IRNSS) [भारतीय क्षेत्रीय नौवहन उपग्रह प्रणाली]
- Japanese Regional Quasi-Zenith Satellite System (QZSS) [準天頂]
- Satellite-Based Augmentation Systems (SBAS)