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Improve map matching - eliminate dead-end edges and unnecessary backtracking #3023

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caspg opened this issue Jun 16, 2024 · 3 comments
Open

Improve map matching - eliminate dead-end edges and unnecessary backtracking #3023

caspg opened this issue Jun 16, 2024 · 3 comments

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@caspg
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caspg commented Jun 16, 2024

I have this problem when sometimes Graphhopper Map Matching creates dead-end edges which probably should be removed from the results. Below are screenshots with example:

I will try to work on this but I will appreciate any help with GH Map Matching algorithm.

Original GPX:

CleanShot 2024-06-16 at 11 51 36@2x

Map matched:

CleanShot 2024-06-16 at 11 51 45@2x
@karussell
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Without the GPX data and the used OSM pbf it is impossible for us to investigate.

@caspg
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caspg commented Jun 16, 2024

@karussell Here it goes:

OSM data: https://download.geofabrik.de/europe/andorra-latest.osm.pbf
GPX: andorra_for_map_matching.gpx.txt (added .txt extention just to upload it here)

I've used bike profile which is in the current master.

Blue is input GPX and red is map matched.

CleanShot 2024-06-16 at 12 29 16@2x

CleanShot 2024-06-16 at 12 29 09@2x

@caspg
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caspg commented Jun 16, 2024

Default car profile behaves the same so it should be even easier to test.

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@karussell @caspg