Hey Matthias, this only enables the possibilities for u-turns. If it does not seem plausible that in fact there was a u-turn, the algorithm is not forced to add a u-turn at that position. Disabling u-turns by default just removes a lot of potential error sources.
Best, Patrick On Thu, Jul 23, 2015 at 3:47 PM, Matthias Schwamborn <schwamb...@informatik.uos.de> wrote: > Hi Patrick, > > thanks for the clarification. So this check is for the input > coordinates, only, right? What if some candidates introduce a U-turn > (e.g., due to some outliers in the input data)? Thanks. > > Best, Matthias > > On 22/07/15 12:17, Patrick Niklaus wrote: >> Hey Matthias, >> >> What the algorithm at that point does is check if the original trace >> might contain a U-Turn at that point. If so it does not add separate >> candidates for each direction (but bidirectional edge based nodes), >> resulting in the possibility of U-Turns at that position. >> >> Hope this helps. >> >> Best, >> Patrick >> >> On Wed, Jul 22, 2015 at 11:28 AM, Matthias Schwamborn >> <schwamb...@informatik.uos.de> wrote: >>> Hi all, >>> >>> looking at the code in plugins/match.hpp [1], I noticed that candidates >>> resulting in a U-turn are allowed but wouldn't you say that these >>> candidates are actually pretty unlikely compared to candidates that >>> don't result in a U-turn? Am I missing something here? Thanks. >>> >>> >>> Best, Matthias >>> >>> [1] >>> https://github.com/Project-OSRM/osrm-backend/blob/master/plugins/match.hpp#L104 >>> -- >>> Matthias Schwamborn >>> >>> University of Osnabrück Tel.: +49-541-969-7167 >>> Institute of Computer Science Fax: +49-541-969-2799 >>> Albrechtstr. 28 E-mail: schwamb...@informatik.uos.de >>> D-49076 Osnabrück, Germany http://cs.uos.de/schwamborn/ >>> >>> >>> _______________________________________________ >>> OSRM-talk mailing list >>> OSRM-talk@openstreetmap.org >>> https://lists.openstreetmap.org/listinfo/osrm-talk >>> >> >> _______________________________________________ >> OSRM-talk mailing list >> OSRM-talk@openstreetmap.org >> https://lists.openstreetmap.org/listinfo/osrm-talk >> > > -- > Matthias Schwamborn > > University of Osnabrück Tel.: +49-541-969-7167 > Institute of Computer Science Fax: +49-541-969-2799 > Albrechtstr. 28 E-mail: schwamb...@informatik.uos.de > D-49076 Osnabrück, Germany http://cs.uos.de/schwamborn/ > > > _______________________________________________ > OSRM-talk mailing list > OSRM-talk@openstreetmap.org > https://lists.openstreetmap.org/listinfo/osrm-talk > _______________________________________________ OSRM-talk mailing list OSRM-talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/osrm-talk
