[mkgmap-dev] Diagnostic warnings for dead-end oneway highway=service

Sun Jan 5 16:25:12 GMT 2014

Hi Marko,

Marko Mäkelä wrote
> There is an efficient algorithm for computing the strongly connected 
> components of a directed graph: 
> http://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm
> 
> Perhaps we could invoke the algorithm in two passes:
> 
> (1) on the undirected graph of roads (hard-wiring oneway=no)
> Each strongly connected component (SCC) would be a routing island.
> (2) for each SCC from step 1 that contains oneway=yes attributes:
> If the SCC would be split, list the oneway=yes ways (or some of them).

sounds plausible. I put that on my todo list, but I guess that it 
has to be done (again) with the RouteNode data, so it will be difficult
to identify the OSM ways.
The question is:
If you get a list of oneway road (parts) which create routing islands, 
is it really the only conclusion that these oneways are wrong?

Gerd 

--
View this message in context: http://gis.19327.n5.nabble.com/Diagnostic-warnings-for-dead-end-oneway-highway-service-tp5791229p5791805.html
Sent from the Mkgmap Development mailing list archive at Nabble.com.