Implement /trace_route

[nilsnolde]

What would you like to share?

Extend the frontend with map-matching functionalities. I'd suggest to support both inputs, encoded polyline (e.g. from an existing Valhalla response shape) and GPX (will need conversion to JSON, incl timestamps ideally). There'd obviously be no waypoint input by the user.

Approx:

• Users can "upload" a GPX file (needs max file size) or copy/paste an encoded polyline
• We parse the polyline or GPX file and display the input to the user simply as a LineString
• When the user chooses to map-match with the input, hits a button
• We send the input to /trace_route and generate the maneuvers & route summary and of course display the final route

Devil's in the details of course, but might not be that crazy much work to realize.

[MihirKp25]

Out of context from issue. Is there any way we can create a GPX file from OSM only?

[nilsnolde]

Yeah, more one for stackoverflow or OSM forum. But also not sure I understand the question.. GPX is just another „geographic“ format for some random LineString. OSM has nothing to do with it. Usually you’d record a track via GPS and the exchange/export format is (unfortunately) often GPX. Nothing stops you from creating a custom GPX file manually or via some scripting.