Hi Marko,
Can you give a hint how to achieve this? The warning would be issued by RoadNetwork.java, which seems to work in the imgfmt domain (RouteNode and RoadDef). How can I get the corresponding OSM node or way, so that I can see if a mkgmap:ignore-zero-length-arc property has been set? Should I just add a Boolean flag to RoadDef and RouteNode and initialize it when the objects are instantiated from OSM data?
Yes, if you are happy for all the arcs that make up a single road to have that property, the easiest thing to do is add a new bool to RoadDef which suppresses the warnings.
Also, will the zero-length-arcs be merged in the .img file, or is there a risk that routing will be broken?
I am still unsure as to when zero length arcs actually cause a routing problem - we know they do but it doesn't appear to be in all situations. To be honest, I don't really understand why you are getting zero length arcs - are you not using --remove-short-arcs? Cheers, Mark