[OSM-talk] Crossings of a road
Here the major road is a dual carriageway with a fence in the middle, so pedestrians cannot cross: http://www.openstreetmap.org/?lat=51.490971lon=-0.234075zoom=18layers=B000FTF There are subways which I have mapped as level=-1 paths crossing the road. But then this path is unconnected to anything else on the map. I want to express that you can walk along one side of the road, then use the subway to get to the other side. To do that I could make the subway have junction nodes with the two carriageways as it crosses them - but that's not quite right because it doesn't physically cross the road, it goes underneath. Or I could even put it just between the two carriageways like a rung in a ladder, but that implies that to use the subway you must walk to the middle of the road to reach it. Or I could add in somewhat bogus paths from each subway entrance back to the main road. I am concerned with providing useful data to routing program. Are there some I can test with to see what is expected? Cloudmade Maps provides directions but its data is not frequently updated. -- Ed Avis e...@waniasset.com ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Crossings of a road
On 12 Jun 2009, at 14:44, Ed Avis wrote: Here the major road is a dual carriageway with a fence in the middle, so pedestrians cannot cross: http://www.openstreetmap.org/?lat=51.490971lon=-0.234075zoom=18layers=B000FTF There are subways which I have mapped as level=-1 paths crossing the road. But then this path is unconnected to anything else on the map. I want to express that you can walk along one side of the road, then use the subway to get to the other side. To do that I could make the subway have junction nodes with the two carriageways as it crosses them - but that's not quite right because it doesn't physically cross the road, it goes underneath. Or I could even put it just between the two carriageways like a rung in a ladder, but that implies that to use the subway you must walk to the middle of the road to reach it. Or I could add in somewhat bogus paths from each subway entrance back to the main road. I am concerned with providing useful data to routing program. Are there some I can test with to see what is expected? Cloudmade Maps provides directions but its data is not frequently updated. You could place a footway parallel to the road and map in higher than normal. Or bring the footway out to the end of the tunnel, roughly like so: | | -|--|- \| |/ | | | | Shaun smime.p7s Description: S/MIME cryptographic signature ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Crossings of a road
My vote is for the bogus paths. They are in fact not bogus. If you were walking along the road and decided to use the subway, were would you leave the road ? Rather than testing out a few ideas on a proprietary routing engine, look at proposals like this one : http://wiki.openstreetmap.org/wiki/Relations/Proposed/Destination_Signs On Fri, Jun 12, 2009 at 3:44 PM, Ed Avis e...@waniasset.com wrote: Here the major road is a dual carriageway with a fence in the middle, so pedestrians cannot cross: http://www.openstreetmap.org/?lat=51.490971lon=-0.234075zoom=18layers=B000FTF There are subways which I have mapped as level=-1 paths crossing the road. But then this path is unconnected to anything else on the map. I want to express that you can walk along one side of the road, then use the subway to get to the other side. To do that I could make the subway have junction nodes with the two carriageways as it crosses them - but that's not quite right because it doesn't physically cross the road, it goes underneath. Or I could even put it just between the two carriageways like a rung in a ladder, but that implies that to use the subway you must walk to the middle of the road to reach it. Or I could add in somewhat bogus paths from each subway entrance back to the main road. I am concerned with providing useful data to routing program. Are there some I can test with to see what is expected? Cloudmade Maps provides directions but its data is not frequently updated. -- Ed Avis e...@waniasset.com ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Crossings of a road
Shaun McDonald sh...@shaunmcdonald.me.uk schrieb: On 12 Jun 2009, at 14:44, Ed Avis wrote: Here the major road is a dual carriageway with a fence in the middle, so pedestrians cannot cross: http://www.openstreetmap.org/?lat=51.490971lon=-0.234075zoom=18layers=B000FTF There are subways which I have mapped as level=-1 paths crossing the road. But then this path is unconnected to anything else on the map. I want to express that you can walk along one side of the road, then use the subway to get to the other side. You could place a footway parallel to the road and map in higher than normal. I often map the pavement/sidewalk separately from the main road when there they are separated from it by a stripe of grass, trees or hedges. However, while this allows for a quite detailed mapping of footpaths, it does not look very nice on the map as you end up with many dashed red lines parallel to each road: http://www.openstreetmap.org/?lat=52.4265lon=-1.94337zoom=16layers=B000FTF I am thinking of tagging these footways as highway=pavement/sidewalk (whatever is not ambiguous) so that renderers can distinguish them from normal footways which are not part of a bigger road. This would allow to only show them in very high zoom levels and also to display them in less catching colours. Or bring the footway out to the end of the tunnel, roughly like so: | | -|--|- \| |/ | | | | Here is an example of what this solution would look like on the map: http://www.openstreetmap.org/?lat=52.47213lon=-1.920605zoom=18layers=B000FTF Cheers, Christoph ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Crossings of a road
Christoph Böhme christoph at b3e.net writes: I want to express that you can walk along one side of the road, then use the subway to get to the other side. I often map the pavement/sidewalk separately from the main road when there they are separated from it by a stripe of grass, trees or hedges. (That's not the case here - there is a pavement by the side of the major road and I was walking along it.) Or bring the footway out to the end of the tunnel, Here is an example of what this solution would look like on the map: http://www.openstreetmap.org/?lat=52.47213lon=-1.920605zoom=18layers=B000FTF I think this is what I'll do. The extra paths from the road to the subway do not physically exist, but they do represent a walking route that I took (if we make the usual assumption that I was walking exactly in the middle of the road and then turned off to take the subway) and they make life easy for routing software. -- Ed Avis e...@waniasset.com ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Crossings of a road
Am 12. Juni 2009 16:50 schrieb Christoph Böhme christ...@b3e.net: You could place a footway parallel to the road and map in higher than normal. Here is an example of what this solution would look like on the map: http://www.openstreetmap.org/?lat=52.47213lon=-1.920605zoom=18layers=B000FTF here is mine: http://www.openstreetmap.org/?lat=41.871128lon=12.501504zoom=18layers=B000FTF unfortunately the bicycle=yes is not visible ;-) but they are indeed also separated by a guard-rail, which I suppose for your example as well. Martin ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Crossings of a road
2009/6/12 Christoph Böhme christ...@b3e.net: Shaun McDonald sh...@shaunmcdonald.me.uk schrieb: You could place a footway parallel to the road and map in higher than normal. I often map the pavement/sidewalk separately from the main road when there they are separated from it by a stripe of grass, trees or hedges. However, while this allows for a quite detailed mapping of footpaths, it does not look very nice on the map as you end up with many dashed red lines parallel to each road: http://www.openstreetmap.org/?lat=52.4265lon=-1.94337zoom=16layers=B000FTF I think this looks fine and is also faithful to the reality, even if the pavement is not physically separate from the road, logically it is a different route. I am thinking of tagging these footways as highway=pavement/sidewalk (whatever is not ambiguous) so that renderers can distinguish them from normal footways which are not part of a bigger road. This would allow to only show them in very high zoom levels and also to display them in less catching colours. This loses the information of which side the sidewalk is and that may be important for routing. Cheers ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Crossings of a road
andrzej zaborowski balr...@gmail.com schrieb: 2009/6/12 Christoph Böhme christ...@b3e.net: Shaun McDonald sh...@shaunmcdonald.me.uk schrieb: You could place a footway parallel to the road and map in higher than normal. I often map the pavement/sidewalk separately from the main road when there they are separated from it by a stripe of grass, trees or hedges. However, while this allows for a quite detailed mapping of footpaths, it does not look very nice on the map as you end up with many dashed red lines parallel to each road: http://www.openstreetmap.org/?lat=52.4265lon=-1.94337zoom=16layers=B000FTF I think this looks fine and is also faithful to the reality, even if the pavement is not physically separate from the road, logically it is a different route. Hmm, I do not really like the looks of it, but that's prorably in the eye of the beholder. I think there is no point in arguing about it. I am thinking of tagging these footways as highway=pavement/sidewalk (whatever is not ambiguous) so that renderers can distinguish them from normal footways which are not part of a bigger road. This would allow to only show them in very high zoom levels and also to display them in less catching colours. This loses the information of which side the sidewalk is and that may be important for routing. No, I do not want to change anything else apart from setting the highway-tag to sidewalk instead of footway. They are still separate ways like I have drawn them. I only thought of tagging them differently from footways to indicate that the are logically linked with a nearby road. However, writing logically linked just rings the relation-bell in my head and it seems that there are already relations for this kind of problem :-) Cheers, Christoph ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
