Hi Peter, We have tried during the past days to make some change on the encoded value but unfortunately we didn't succeed ... To avoid that, I was wondering if there was a way to ask graphhopper to calculate the shortest way only with duration tags ? That means asking graphhopper to take in account only duration (not distance with speed). Is there a basic way to do that ?
Thanks again Jean 2015-05-07 0:34 GMT+02:00 Peter <[email protected]>: > Hi Jean, > > the precision of an encoded value is defined per value and can be also > 'float' values. See the EncodedValue class and its usage e.g. in > CarFlagEncoder for speed. > > Regards, > Peter > > On 06.05.2015 14:18, jean hilda wrote: > > Hi, > > > > Thank you Andreas and Peter for your help. We have already tried to > solve the problem by defining a speed on the ferry routes (with speed in > km/h = Duration / Ferry route lenght). But we are facing another > difficulties : most of our ferry routes are very short distance (around 200 > meters) and for the duration, it's generally around 50 minutes (because of > waiting time / frequency of rotation and so on). So we get speed for our > ferry routes < 1 km (could be 0.2 Km / h). I believe speeds on Graphhopper > has to be strictly > 1 km /h (it has to be an integer). Is there a way to > change that somewhere in the code and authorize speed between 0 and 1 km /h > (not integer) ? > > > > Thanks a lot > > > > Jean > > > > 2015-05-06 11:46 GMT+02:00 Andreas Wolf <[email protected] <mailto:[email protected]> > <[email protected]>>: > > > > Hi, > > Am 05.05.2015 um 12:10 schrieb jean hilda: > > We are testing graphhopper with the CarFlagEncoder. To do so, we > > have created ways with highway=primary and maxspeed value and ways > > with route=ferry and duration tags with value = "hh:mm:ss" (no > > maxspeed for ferry). > > > primary ways and ferry routes are connected with nodes belonging to > > each others. With duration tag and no maxspeed tag on ferry > > routes, Graphhopper can't find a route. With no duration tag and > > maxspeed tag on ferry routes, Graphhopper is able to find a route. > > > Are we missing something or maybe graphhopper don't work with > > duration tags on ferry route ? > > AFAIK, there is no support for durations currently. At least I have > not seen it in the flag encoding, which is where it should normally be. > > There are—in my eyes—two ways to add this: > > 1. add support for durations in addition to speed or > 2. use the length of the ferry and the time to calculate a speed > > Approach 1 is definitely more work, especially in the routing part (I > have not really dug into that, so I cannot tell you exact steps). > Approach 2 OTOH might be rather inaccurate, as the speed is rounded > with a given precision (I think 5 km/h by default) to save space. With > an additional flag, you could probably turn off this rounding for some > ways (at the expense of lower possible maximum speed, but ferries are > rather slow anyways). > > Regards > Andreas > > > > > _______________________________________________ > > GraphHopper mailing list > > [email protected] <mailto:[email protected]> > <[email protected]> > > https://lists.openstreetmap.org/listinfo/graphhopper > > > > > > > > > > _______________________________________________ > > GraphHopper mailing list > > [email protected] > > https://lists.openstreetmap.org/listinfo/graphhopper > > > > _______________________________________________ > GraphHopper mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/graphhopper > >
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