Furthermore, some stations are upgraded with multi-GNSS receivers capable of obtaining signals from GPS, GLONASS, Galileo and other GNSS (BeiDou, QZS, etc.). Currently, the IGS network consists of more than 500 globally distributed stations, equipped with geodetic-quality receivers that track the GPS satellite constellation a subset of this network are capable of tracking both GPS and GLONASS satellite signals. The following GPX file shows the organization of GPS data in a GPX file and can give a good idea about the contents of a GPX file.The GNSS data consist of the receiver’s observation data, the broadcast orbit information of the tracked satellites, and supporting data, such as meteorological parameters, collected from co-located instruments. It consists of a list of track points which represent a continuous GPS track. It is made of at least one segment containing waypoints in an ordered list of points describing a path.

Tracks: Tracks represent layer of features of OGR type wkbMultiLineString.

It includes a list of track points, which are waypoints showing a turn or stage points which lead to a destination

Routes: Represent a layer of features of OGR type wkbLineString.

Waypoints: A waypoint is a WGS84 (GPS) coordinates of a point and represent layer of features of OGR type wkbPoint.

Essential Dataįollowing is essential data that is part of a GPX file for representation of GPS data. The GPX Schema shows the representation fo GPX file format for reference. GPX makes it easy for anyone on the web to develop new features which will instantly work with your favourite programs.GPX is based on the XML standard, so many of the new programs you use (Microsoft Excel, for example) can read GPX files.GPX can be transformed into other file formats using a simple webpage or converter program.GPX allows you to exchange data with a growing list of programs for Windows, MacOS, Linux, Palm, and PocketPC.The benefits of using a GPX file are as follow: Time in a GPX file is are in Coordinated Universal Time (UTC) using ISO 8601 format. Location data is expressed as decimal degrees and elevation is expressed in meters. GPX File FormatĪ GPX file consists of latitude and longitude location data, elevation values and other possibly other descriptive information. GPS data from such files can be loaded for display on mapping applications for geo-spatial purposes. GPX file format is open and is supported by variety of applications and GPS devices. waypoints, routes and tracks to be imported and red by multiple programs.

It is a light-weight XML file format that contains GPS data i.e. Files with GPX extension represent GPS Exchange format for interchange of GPS data between applications and web services on the internet.

Gps almanac file format