https://ikml.com/tags/gps/ Recent content in Gps on ikml.com Hugo en-us Sun, 25 Oct 2026 00:00:00 +0000 https://ikml.com/gps-tracks-with-timestamps-and-what-happens-to-them-in-geojson/ Sun, 25 Oct 2026 00:00:00 +0000 https://ikml.com/gps-tracks-with-timestamps-and-what-happens-to-them-in-geojson/ <p>A GPS track in KML is more than a line. Google&rsquo;s <code>gx:Track</code> element stores a time for every position, so a ride, a run or a vehicle&rsquo;s day can be replayed, measured for speed and matched against other data by time. Fitness devices and tracking apps also attach values per point, such as heart rate or speed, as <code>SimpleArrayData</code>.</p> <p>A plain conversion to GeoJSON turns the track into a LineString, and the times are gone. The line is still there, so it looks fine on a map, until someone asks how long a stretch took.</p>