Import/export

Starting from version 0.17, nhGPS uses the GPX 1.1 file format for waypoints, maps and tracks. GPX is an XML-based standard for GPS data files, supported by a growing number of vendors. Using GPSBabel, conversion to and from many other formats is possible.

Since version 1.2, nhGPS can store its data to either the internal disk or to the memory stick, in the folders c:\documents\Media Files\document\nhgps\ or d:\Media Files\document\nhgps\ repectively. Maps and waypoints are stored in files <categoryname>.gpx (i.e. Unfiled.gpx). So all maps and waypoints of a category are stored together in one file. Tracks are stored differently: because track files can easily grow large, an efficient binary format (.nhtrk) is used instead. These binary track files can easily be imported from and exported to GPX format.

Although nhGPS stores map calibration data in GPX format, the GPX standard does not actually support such map calibration data. Therefore, the map data is stored in the proprietary extensions section of the GPX file. Although nhGPS users can exchange maps, exchanging maps with other applications currently is not supported.

Importing maps, waypoints and/or tracks

Important: always quit nhGPS before importing data! Then simply place the .gpx file containing the data to be imported in the folder document\nhgps\. If the file was named mydata.gpx, you will see a new category mydata in the folder list in nhGPS, containing the imported data.

Upon startup, nhGPS extracts any track/route data from .gpx files and converts it into the binary .nhtrk format, to conserve disk space. Currently, nhGPS does not distinguish between routes and tracks.

Exporting waypoints and/or maps

You can simply take the .gpx file of the category containing the data to be exported (e.g. Unfiled.gpx) and import it into any other GPX capable application. The .gpx files don't contain track data.

Exporting tracks

Track data is not stored in .gpx files and therefore need to be explicitly exported. In nhGPS, select the track to be exported. Then choose Track / Edit / Export. This will write a .gpx file to the folder document\nhgps_export\, which can be imported in other applications.