Routing A12 -> A4 near Den Haag

Hi,

while playing with the routing in MapSource for my self-generated mkgmap-Map
I discovered I very bad routing when going from A12 to A4.

Here the good route, which OpenRouteService calculates for car/fastest:
(if the route is not shown click on zoom in/out)

http://data.giub.uni-bonn.de/openrouteservice/index.php?start=4.4349476,52.0513736&end=4.4101104,52.0815777&pref=Fastest&lang=de&noMotorways=false&noTollways=false

But in mapsource the route goes first from A12 to A4 in south direction, then does a U-turn at the A4/A13 link
and then the A4 to the destination in north direction.

In openrouteservice I get this route when I add a via-node:

http://data.giub.uni-bonn.de/openrouteservice/index.php?start=4.4349476,52.0513736&end=4.4101104,52.0815777&via=4.3778058,52.0619551%20&pref=Fastest&lang=en&noMotorways=false&noTollways=false

Can anyone reproduce this in mapsource ?

I didn’t check yet, if my Etrex is calculating the same route as mapsource.

Chris

I get the same route in www.yournavigation.org when you add the endmarker on the middle lane of the A44. The highway_link goes on parallel to the A44 for quite a while before joining, so maybe you just need to add your end marker a bit further up the A44? If I do that, then the route is just fine.

I am aware of that and so my end marker is already more in the north (where all the lanes have
come together).

Does anyone know how to set the START-Point for routing in the Etrex ?

Chris

Ok, on the satellite screen you can select “new position” in the menu, and then you can put
the GPS into demo mode.

The routing was the same as in Mapsource.

But I found the reason for the bad routing: A data error. :open_mouth:

http://keepright.ipax.at/report_map.php?db=osm_EU&zoom=17&lat=52.07757&lon=4.4061&layers=B00T&ch30=0&ch40=0&ch50=1&ch60=0&ch70=0&ch90=0&ch100=0&ch110=0&ch120=0&ch130=0&ch150=0&ch160=0&ch170=0&ch180=0&ch191=0&ch192=0&ch193=0&ch194=0&ch201=0&ch202=0&ch203=0

I guess that ORS and yournavigation automerge points on the same spot,
so that the error is not occuring in these routing services.
Chris

Ha! damn those data errors :slight_smile: Did you fix it as well?

Not yet, I’m on a business trip and have no access to JOSM.
Chris

Ok, I fixed it.

Ja, Ik heb saan in keepright.

Daa zijn noog helemal veel verbindings errors in deeze area.

Maar net so belangrik als dat betrefft geen motorways… :wink:

Ik denk mijn nederlands is nit so well. :smiley:

Bedankt,
Chris

You won’t pass an exam, but it’s perfectly understandable. :wink: