Stefan Hahmann

Thanks for the advice. I did not see the optional checkbox to enable multithreading when running napari from command line. But now I found it. 

Just an observation adding on this: a couple of months ago I have observed that HERE Maps supports routing through open spaces: https://wego.here.com/directions/walk/Hauptstra%C3%9Fe-122,-69117-Heidelberg,-Deutschland:49.41158,8.70536/Marsiliusplatz,-69117-Heidelberg,-Deutschland:49.41048,8.70710?map=49.41089,8.70754,18,pedestrian&msg=Augustinergasse%207 Though they do not use OpenStreetMap data

There is an solution implemented here (even based on Graphhopper): https://github.com/GIScience/openrouteservice/blob/master/openrouteservice/src/main/java/heigit/ors/routing/graphhopper/extensions/graphbuilders/InFieldGraphBuilder.java It is slightly modified version of the algorithm described here: https://www.researchgate.net/publication/305272744_Integrating_Open_Spaces_into_OpenStreetMap_Routing_Graphs_for_Realistic_Crossing_Behaviour_in_Pedestrian_Navigation For alternative algorithms, cf. also this recent publication:...

Forgot to mention that it can be tested here (pedestrian profile): https://labs.openrouteservice.org/

You are right .. here are some examples, when this was working: http://k1z.blog.uni-heidelberg.de/2017/11/27/routing-through-open-spaces-%e2%80%93-a-performance-comparison-of-algorithms/ But currently, it does not seem to be active. Sorry for the misinformation.

@sfkeller @boldtrn a master thesis at Heidelberg University completed in 2016 (by @JakobMiksch) had a very similar scope. Results have been published open access: http://www.tandfonline.com/doi/full/10.1080/10095020.2017.1399675 (this paper gives some insights...

Cf. comment from 16.03.2018: https://github.com/graphhopper/graphhopper/issues/82#issuecomment-373625067

https://www.tandfonline.com/doi/full/10.1080/10095020.2017.1399675 Table 1 shows that open spaces are rare case in OSM though.

Just see that the openrouteservice link was broken. This one should work: https://github.com/GIScience/openrouteservice/blob/master/openrouteservice/src/main/java/org/heigit/ors/routing/graphhopper/extensions/graphbuilders/InFieldGraphBuilder.java

> I could not reproduce with beta-29 on Mac or on Windows. Could you try with a 'fresh' Fiji? Or on another computer? I could reproduce the bug yesterday on...