GPS Tuner (.trk)
A GPS Tuner .trk file is a recorded track — one line per position, with latitude, longitude, altitude, speed, time and heading.
At a glance
| Extension | .trk |
| Encoding | text |
| By | GPS Tuner |
History
GPS Tuner started as a Pocket PC application for high-precision GPS measurement, mapping with calibrated raster images (JPG, GIF, PNG or BMP as maps) and geocaching, letting a user record a track, convert it to a route, and backtrack along it. The company behind it, also named GPS Tuner, describes itself as being in the navigation software business since 2003; it later expanded into eMobility software (navigation and range prediction for e-bikes and electric vehicles) from 2012 onward, which is its main current business.
Where it is used
The classic Pocket PC application recorded and displayed GPS tracks over a user-supplied calibrated raster map — an approach common to that generation of PDA navigation software, alongside tools like OziExplorer CE.
Structure
A plain-text file: a first header line naming it a "GPS Tracklog", a second, fixed CSV-style header line ("Latitude(Degree);Longitude(Degree);Altitude(m);Speed(kmph);Date(Unix TimeStamp);Segment;Heading(Degree)"), then one semicolon-separated data line per recorded position.
How widespread
The original Pocket PC GPS Tuner application is a legacy product from the PDA era; the company's current business has moved on to eMobility navigation SDKs, so files in this format today come from an old Pocket PC install rather than a currently-sold product.
RouteConverter support
| Reads | GPS Tuner |
| Writes | GPS Tuner |
RouteConverter reads and writes GPS Tuner tracks directly, without GPSBabel.