Hi Jan, we do this kind of 'merging' logic already in the import step when deciding what should be handled as tower node and what is a pillar node. Otherwise you'll need as twice as many RAM when copying from one graph to the other.
> Have you made a experiment to count the number of 2 degree nodes with the equal flags and name in OSM? > And then we can know how many edges we can save. Yes, this should be done before implementing it :) And as the merging logic is currently not 100% optimal, there could be some minor savings even when recognizing the different street names, but I'm unsure if it is worth the effort. Issues like #234 or #111 will probably make more difference. Kind Regards, Peter On 02.06.2015 22:35, John Zhao wrote: > Hi, > > AFAIK, there is no this kind of merging logic here. > Wait the answer from Peter. > Probably you need to implement it by your own. > And it's not easy. > Maybe can be done before import? > What you want, is actually convert a tower node to a pillar node. > > > *Best Regards,* > *ZhiQiang ZHAO* > > On Tue, Jun 2, 2015 at 1:27 PM, Jan Torben Heuer <[email protected] > <mailto:[email protected]>> wrote: > > Hi ZhiQiang ZHAO, > > Thanks for your quick answer. > I have a custom FlagEncoder that imports only very few ways and I > don’t need the names. I guess, I have mostly nodes with a degree > of two. > > Jan > > Am 02.06.2015 um 21:53 schrieb John Zhao <[email protected] > <mailto:[email protected]>>: > >> Hi, >> >> Have you made a experiment to count the number of 2 degree nodes >> with the equal flags and name in OSM? >> And then we can know how many edges we can save. >> >> I doubt this should be not too much for OSM. >> >> *Best Regards,* >> *ZhiQiang ZHAO* >> >> On Tue, Jun 2, 2015 at 11:59 AM, Jan Torben Heuer <[email protected] >> <mailto:[email protected]>> wrote: >> >> Hi, >> >> Can Graphhopper merge two ways with equal flags and name if >> there is no intersection between them (no third way connected)? >> >> I would like to create a very reduces graph with only few >> edges. What would be the easiest way to achieve it? I think I >> would have to disable the nameIndex for instance. >> >> Thanks, >> >> Jan >>
_______________________________________________ GraphHopper mailing list [email protected] https://lists.openstreetmap.org/listinfo/graphhopper
