search

amillb / pgMapMatch

map-matching of GPS traces
MIT License
77 stars 20 forks source link

WKT LINESTRING does not match Edge IDs #29

Closed mlauu closed 1 year ago

mlauu commented 1 year ago

Hi,

I tried to map-match a trace and followed all steps in your README (used osm2po, altered the table for the projection, ...) (I used the projection 4087).

I used the CLI and a GPX file as input. I wrote the output to a file. The edge ids are correct for the original noisy trace of the GPX file but the LINESTRING contains weird positions and I have no idea why.

Is there a known solution to this issue (I assume I made a mistake during setup, but the fact that the Edge IDs are correct baffles me)

Here is the input & output of the simulated trace in London. input(GPX_not_supported).txt output.txt

Many thanks in advance!

amillb commented 1 year ago

Can you explain more about what you were expecting for the line string? Note that the coordinates will be in your local projection, not lat/lon.

mlauu commented 1 year ago

Hi, I checked the projection of the output again and it is as I assumed. Had a bug in my setup. My app did not save the output correctly and used an old output with a different srid for the following conversion... fixed it and it works fine now. Thanks for the prompt response!