Hi Thomas, there are two reasons for this behavior I can think of: 1. There was an explicit length set for this edge or lane (possibly by using no-internal-links switch which adapts edge length to compensate for junctions) 2. The edge has large curvature which may result in differences for the outer lanes because currently all lanes of the same edge have the same length internally although they have different geometries.
Best regards, Michael Am 29.01.2016 um 16:59 schrieb Lockhart, Thomas G (398I): > > On Jan 28, 2016, at 10:46 PM, Jakob Erdmann > <[email protected]<mailto:[email protected]>> wrote: > > Hello Tom, > SUMO (or rather NETCONVERT) uses the same geometry model as OSM. It takes all > geometry points along a <way> or <edge> and connects them with straight > lines. Thus you can approximate curves (visually) as closely as you want but > need to expend some effort to compute radii. > Within intersections, geometries are computed using splines with a > configurable number of geometry points. (--junctions.internal-link-detail) > Vehicle positions are always computed along these straight-line segments. The > relevant code is > microsim/MSVehicle::getPosition() > > Hmm. Thanks for the info. > > What I’m tracking down is an issue where the position in the dump file is > larger than the sum of the straight-line segments in the edge (or actually > the lane). The position can be up to 3 meters larger, and I was guessing > (hoping?) that this was due to SUMO using curved lanes rather than straight > segments. > > Any ideas on where the “position greater than the sum of segments” might come > from? > > Regards, > > - Tom > > > regards, > Jakob > > 2016-01-29 4:19 GMT+01:00 Lockhart, Thomas G (398I) > <[email protected]<mailto:[email protected]>>: > I’d like to examine how SUMO models a road (and lane) given either an OSM > file or node and edge files. In particular I’m looking at the relationship > between the instantaneous position along the lane in the dump or FCD output > file relative to the geometry of the lane. Does SUMO model curved paths given > multi-point edge or lane shapes? Or is it strictly linear from one segment to > the next? > > In any case, can someone give me a hint on where that code might live? > > tia > > - Tom > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 > _______________________________________________ > sumo-devel mailing list > [email protected]<mailto:[email protected]> > https://lists.sourceforge.net/lists/listinfo/sumo-devel > > > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 > _______________________________________________ > sumo-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/sumo-devel > ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ sumo-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sumo-devel
