Hi Peter, I am still confused. at first we call map = findSubnetworks();
after the cleanup, we call the same method in Graphhopper. int remainingSubnetworks = preparation.findSubnetworks().size(); Why the subnetwork was recognized the latter time, but not the first time? we remove some edges make it not connected? *Best Regards,* *ZhiQiang ZHAO* On Thu, Jul 23, 2015 at 2:22 PM, Peter <[email protected]> wrote: > > Hi ZhiQiang, > > yes, according to the wiki this is wrongly mapped: > * Avoid tagging highway intersections as that does not make clear which > way has the impediment. * > > http://wiki.openstreetmap.org/wiki/Tag:barrier%3Dgate > > Peter > > > On 23.07.2015 23:16, John Zhao wrote: > > Hi Peter, > > Maybe the following one related with > https://github.com/graphhopper/graphhopper/issues/388#issuecomment-88066385 > > > I have a look at 37.32611992939085,-121.9961998312816. > It seesm related with barrier=gate at intersection. > http://www.openstreetmap.org/node/1126492194 > > *Best Regards,* > *ZhiQiang ZHAO* > > On Thu, Jul 23, 2015 at 2:11 PM, Peter <[email protected]> wrote: > >> >> There are two types of subnetworks and the smaller ones seems to be >> 'one-way subnetworks' which means they are eg. only reachable as >> destination or start. But if you would start from a destination-only >> subnetwork you'll get 'not found' for all points outside of this network. >> >> Regards, >> Peter >> >> >> On 23.07.2015 23:03, John Zhao wrote: >> >> Interesting, >> when I increase minOnewayNetworkSize from 20 to 50, the following two >> disappeared. >> subnetwork start from: 37.32611992939085,-121.9961998312816 size: 24 >> subnetwork start from: 37.78373608999855,-122.25065187925067 size: 34 >> >> *Best Regards,* >> *ZhiQiang ZHAO* >> >> On Thu, Jul 23, 2015 at 1:55 PM, John Zhao <[email protected]> wrote: >> >>> Hi, >>> >>> I tried car flag encoder with following parameter on San Francisco bay >>> area data from mapzen. >>> >>> https://s3.amazonaws.com/metro-extracts.mapzen.com/san-francisco-bay_california.osm.pbf >>> >>> minNetworkSize=200 >>> minOnewayNetworkSize=20 >>> >>> I printed all the remaining subnetworks. >>> edges: 591932, nodes 437420, there were 3496 subnetworks. removed them >>> => 13121 less nodes. Remaining subnetworks:5 >>> The remaining subnetworks are: >>> subnetwork start from: 37.32611992939085,-121.9961998312816 size: 24 >>> subnetwork start from: 37.56018439442332,-122.30257814308803 size: 436637 >>> subnetwork start from: 37.78373608999855,-122.25065187925067 size: 34 >>> subnetwork start from: 38.180185962770565,-121.70631393878864 size: 301 >>> subnetwork start from: 37.85717050411933,-122.07633641532816 size: 424 >>> >>> I don't understand why there is still subnetwork less than 200 nodes. >>> >>> I have a look at 37.32611992939085,-121.9961998312816. >>> It seesm related with barrier=gate at intersection. >>> http://www.openstreetmap.org/node/1126492194 >>> >>> *Best Regards,* >>> *ZhiQiang ZHAO* >>> >> >> > > _______________________________________________ > GraphHopper mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/graphhopper > >
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