[OSM-talk] Crossings of a road

[Christoph Böhme]

Shaun McDonald <shaun at 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=51.490971&lon=-0.234075&zoom=18&layers=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=52.4265&lon=-1.94337&zoom=16&layers=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=52.47213&lon=-1.920605&zoom=18&layers=B000FTF

	Cheers,
	Christoph