Re: [sumo-user] geometry.remove.min-length

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

Hello Lukas

It would be less obvious how to join edges with differing lane numbers.

- there would be two thresholds involved (edge length and lane-count difference)

- the connections at the start, join and end would have to be recomputed.

- if the short edge has more lanes then it must be decided which of them is removed (non-trivial if there are mode-specific lanes involved such as a bus lane)

Hence I'm unsure if a solution is possible that would be generally useful (and not just tailored to one specific project).

With a bit of python processing you could iterate over the network edges (sumolib.redNet().getEdges()) and create a patch .edg.xml file to change lane numbers according to your needs, then use the min-length option. (see https://sumo.dlr.de/docs/Tutorials/ScenarioGuide.html#modifying_the_network)

regards,

Jakob

Am Fr., 20. März 2020 um 17:56 Uhr schrieb Lukas Ambuehl <kitatsuab@xxxxxxxxx>:

Thanks Jakob for the quick follow-up. 

Would that be a potential enhancement?

Similar to geometry.remove.width-tolerance, you could set a threshold? 

I am asking because I am using meso, and as discussed previously, short edges have adverse effects  (and this seems to propagate onto other edges as well). 

On 20 Mar 2020, at 17:36, Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:

Hello,

geometry.remove will never join edges that differ in the number of lanes. The option geometry.remove.min-length only applies to attributes such as speed, permissions and width.

regards,

Jakob

Am Fr., 20. März 2020 um 17:14 Uhr schrieb Lukas Ambuehl <kitatsuab@xxxxxxxxx>:

Hi all

I am trying to reduce the number of short edges in my network.

I use the following netconvert options: 

     <geometry.remove value="true"/>

     <edges.join value="true”/>

     <geometry.remove.min-length value=“30"/>

     <geometry.min-dist value=“20"/>

     <geometry.remove.width-tolerance value=“2"/>

     <geometry.max-segment-length value="200”/>

I thought that geometry.remove.min-length  would control for the max. length of an edge being merged with another one and geometry.remove.width-tolerance for the difference in numbers of lanes allowed. However, when running this on an OSM derived network, some edges really do not want to merge with others. See attached screenshot of an edge < 30m, which doesn’t want to be merged. Does it somehow depend on the junction that follows or on the length of the other edges?

Any ideas on how to go about this? (I can also provide a MWE if needed)

Thanks

Lukas

<PastedGraphic-1.tiff>

_______________________________________________
sumo-user mailing list
sumo-user@xxxxxxxxxxx
To unsubscribe from this list, visit https://www.eclipse.org/mailman/listinfo/sumo-user

_______________________________________________
sumo-user mailing list
sumo-user@xxxxxxxxxxx
To unsubscribe from this list, visit https://www.eclipse.org/mailman/listinfo/sumo-user

_______________________________________________
sumo-user mailing list
sumo-user@xxxxxxxxxxx
To unsubscribe from this list, visit https://www.eclipse.org/mailman/listinfo/sumo-user