Support reading and writing GPX files

[ileasile]

Geojson is good, but the training data and routes (komoot, Strava) are usually stored in GPX format. I'd appreciate the support for it or at least example notebooks with analysis of such data (I can donate my personal training records / routes for this sake)

[koperagen]

Agree with idea of support/example!
In my experience good way to work with different geodata formats is https://formulae.brew.sh/formula/gdal and its https://gdal.org/en/stable/programs/ogr2ogr.html utility.
ogr2ogr -f GeoJSON output.geojson input.gpx. But sometimes formats are not fully compatible and conversion fails/looses some information that cannot be represented in target format