graph-based isochrones / isodistances about osrm

[rCarto]

Hi,
I would be happy to use a more precise or elegant way to construct isochrones in osrm.
The current function (rasterToContourPoly()) initially comes from SpatialPosition package and is quite convoluted...

If I understand correctly, the method proposed by Kuan Butts is based on an actual network (with nodes and edges). osrm (and the underlying OSRM server) does not allow to output the network but only the distance matrix. I think that make this method unusable?

Anyway, I am open to any suggestion to improve the isochrone construction process...

[e-kotov]

@rCarto , thanks for the reply.

It seems I did not think this through... osrmIsochones and osrm package does not rely on the user actually having the road network data loaded into the R environment as it only sends the requests to the osrm-backend online or in a docker container and then does the calculation only using the resulting OD matrix... However, I will think about any other possible improvements to the algorithm.

[rCarto]

@e-kotov, I think I can close this issue for now. Don't hesitate to come back if you have any suggestion to improve isochrones creation.