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  2. This WKT format was initially defined by the Open Geospatial Consortium (OGC) in 1999, then extended in 2001. This format, also defined in ISO 19125-1:2004, is sometime known as "WKT 1". [ 5 ] Later, evolution of the Coordinate Reference System conceptual model, new requirements and inconsistencies in implementation of WKT 1 format between ...

  3. Geographic coordinate conversion - Wikipedia

    en.wikipedia.org/wiki/Geographic_coordinate...

    Coordinate conversion is composed of a number of different types of conversion: format change of geographic coordinates, conversion of coordinate systems, or transformation to different geodetic datums. Geographic coordinate conversion has applications in cartography, surveying, navigation and geographic information systems.

  4. GPS signals - Wikipedia

    en.wikipedia.org/wiki/GPS_signals

    The navigation message consists of 30-second frames 1,500 bits long, divided into five 6-second subframes of ten 30-bit words each. Each subframe has the GPS time in 6-second increments. Subframe 1 contains the GPS date (week number), satellite clock correction information, satellite status and satellite health.

  5. GPSBabel - Wikipedia

    en.wikipedia.org/wiki/GPSBabel

    GPSBabel is a cross-platform, free software to transfer routes, tracks, and waypoint data to and from consumer GPS units, and to convert between GPS data formats. [2] It has a command-line interface and a graphical interface for Windows, macOS, and Linux users.

  6. ISO 6709 - Wikipedia

    en.wikipedia.org/wiki/ISO_6709

    Latitude is a number preceded by a sign character. A plus sign (+) denotes northern hemisphere or the equator, and a minus sign (-) denotes southern hemisphere. [d] The integer part of the number is a fixed length. The number of digits in that part indicates the units, thus leading zero(es) must be filled when necessary.

  7. GPS Exchange Format - Wikipedia

    en.wikipedia.org/wiki/GPS_Exchange_Format

    GPS Exchange Format (GPX) is an XML schema designed as a common GPS data format for software applications. It can be used to describe waypoints, tracks, and routes. It is an open format [2] and can be used without the need to pay license fees. Location data (and optionally elevation, time, and other information) is stored in tags and can be ...

  8. RINEX - Wikipedia

    en.wikipedia.org/wiki/RINEX

    RINEX version 3.02 was submitted in April 2013 and contain new observation codes [3] from GPS or Galileo systems. Although not part of the RINEX format, the Hatanaka compression scheme is commonly used to reduce the size of RINEX files, resulting in an ASCII-based CompactRINEX or CRINEX [4] format. [5]

  9. Decimal degrees - Wikipedia

    en.wikipedia.org/wiki/Decimal_degrees

    Decimal degrees (DD) is a notation for expressing latitude and longitude geographic coordinates as decimal fractions of a degree.DD are used in many geographic information systems (GIS), web mapping applications such as OpenStreetMap, and GPS devices.

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