Re: [sumo-user] Problem with resulting geometries when using Shapefiles

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

You could set the option --ramps.guess (on initial import or for post-processing) and it will fix the geometry of the off-ramp so that it aligns better with the main road (less overlap).

Note:

- this will only work if the geometry of the off-ramp is not too dense (otherwise the adjacent geometry points will still look ugly)

- the option will only trigger if the motorway is recognized as such which requires it to have a minimum speed of 79km/h (threshold adjustable with option --ramps.min-highway-speed)

Otherwise, your best remedy is to fix things manually in netedit: https://sumo.dlr.de/docs/Netedit/neteditUsageExamples.html#specifying_the_complete_geometry_of_an_edge_including_endpoints

regards,

Jakob

Am Mi., 27. Jan. 2021 um 19:05 Uhr schrieb Michael <sederlinmichael@xxxxxxxxx>:

Hi,

I have some questions about using shapfiles to generate a simulation
network.

Currently I have a shapefile containing a highway network with x,y,z
coordinates in a known reference system as well as attributes for
lanenumbers and posted speeds.
My main problem at this stage is for netconvert to correctly generate
on/off-ramps.

As an example I have the following piece of road.

<http://sumo-user-mailing-list.90755.n8.nabble.com/file/t278/img.jpg>

Which in my shapefile looks like (with labels for the number of lanes):
<http://sumo-user-mailing-list.90755.n8.nabble.com/file/t278/img2.jpg>

However when I run netconvert the same section looks like this in Netedit
(after computing junctions):
<http://sumo-user-mailing-list.90755.n8.nabble.com/file/t278/img3.jpg>

Is there a good method to processing the network in my GIS editor before
passing it to Netconvert in order for on/off-ramps to be computed correctly?

Kind regards and grateful for any assistance,
Michael



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