Routing problem and question about footways
I had a routing problem a long time ago and never understood the reason. Now that I have made several map contributions, fixes and compiled my own map, I thought I found the reason for the routing failure. This is the area in question: http://www.openstreetmap.org/?lat=35.85391&lon=-78.87081&zoom=17&layers=M If you route near the bridge between the buildings or to a point where it is the closest element that's routable, there is a routing error. I removed that footway between the buildings, recompiled the map and the problem went away. So, any suggestions on how this can be fixed? Also, should footways be routable by default when using MapSource or the GPS? Just wondering what's the best solution for this type of problem. I've found many instances of footways/cycleways that are not properly connected to the near by roads that cause this type of routing problem. Any thoughts, ideas or suggestions are welcome.
On Tue, May 17, Francisco Moraes wrote:
I had a routing problem a long time ago and never understood the reason. Now that I have made several map contributions, fixes and compiled my own map, I thought I found the reason for the routing failure. This is the area in question:
http://www.openstreetmap.org/?lat=35.85391&lon=-78.87081&zoom=17&layers=M
If you route near the bridge between the buildings or to a point where it is the closest element that's routable, there is a routing error. I removed that footway between the buildings, recompiled the map and the problem went away. So, any suggestions on how this can be fixed?
This can only be fixed by fixing the OSM data: Either connect all routeable ways or mark this special bridge as not routeable.
Also, should footways be routable by default when using MapSource or the GPS?
Of course they should, why not? I personally need it very often.
Just wondering what's the best solution for this type of problem. I've found many instances of footways/cycleways that are not properly connected to the near by roads that cause this type of routing problem.
The only solution is to fix the data. Here in Nuernberg, somebody did draw all plattforms for public transport and marked them as footway, but didn't connect them with the street. As result, you always get an routing error if you try to route to a stop position for bus or tram... Thorsten -- Thorsten Kukuk, Project Manager/Release Manager SLES SUSE LINUX Products GmbH, Maxfeldstr. 5, D-90409 Nuernberg GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB 16746 (AG Nürnberg)
On Wed, May 18, 2011 at 07:27:35AM +0200, Thorsten Kukuk wrote:
The only solution is to fix the data. Here in Nuernberg, somebody did draw all plattforms for public transport and marked them as footway, but didn't connect them with the street. As result, you always get an routing error if you try to route to a stop position for bus or tram...
Some people seem to prefer to omit ways through areas, such as amenity=parking,parking=surface or highway=pedestrian areas (plazas or squares). That tends to break routing too. I came across a funny incident some time ago. When I routed to a POI that was along a plaza, the Garmin Edge 705 somehow chose to use gmapbmap.img, apparently because there was a major highway in the basemap running next to the POI. Renaming the gmapbmap.img did trigger a routing error. Marko
participants (3)
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Francisco Moraes -
Marko Mäkelä -
Thorsten Kukuk