1ec5 left a comment (openstreetmap/openstreetmap-website#6873)
The example Traccar output above is only useful for visualization, akin to
GeoJSON. A KML `<Placemark>` contains a vector
[geometry](https://developers.google.com/kml/documentation/kmlreference#geometry).
Traccar’s output uses a `<LineString>` element that contains the individual
trackpoints in a `<coordinates>` tag. These coordinates lack individual
timestamps, apparently relying on the consumer to display the entire trace at
once or interpolate the points. As noted in
https://github.com/openstreetmap/openstreetmap-website/pull/6876#pullrequestreview-3929002753,
we require a timestamp per coordinate in order to animate the trace accurately
and also store the points individually.
Google’s KML profile has an alternative geometry type,
[`<gx:Track>`](https://developers.google.com/kml/documentation/kmlreference#gxtrack),
that annotates each coordinate in the track with a timestamp. This would be
useful for our purposes. Do you know if there are any popular software packages
that produce KML with tracks in them?
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