There is a fairly big area in southern Germany that we are unable to get isochrones calculated in.
Each of these gives us the error below:
Speed cannot be 0 for unblocked edge, use access properties to mark edge blocked! Should only occur for shortest path calculation. See #242.
I did investigate the area in OSM’s live data for anything tagged
=0 using Overpass Turbo but could not find anything. How could we proceed looking for the culprit? Which other values, tags or tag combinations would lead to a speed 0 in graphhopper?
Using the latest version of https://github.com/graphhopper/graphhopper/ (isochrone_open_source branch).
Tested with europe_germany.pbf of 2018-02-22 as well as 2018-03-06.