On 26/08/2009, at 1:38 PM, John Smith wrote: > I agree, we need more tags to describe the railway crossing's > feature set, boom_gate=no, lights=no etc, however this is a special > case for stop signs because they will exist either side of the > junction and never applies to the railway line. Unlike junctions of > road traffic which needs to be differentiated from the way.
This brings up an interesting question, when you're "finding the nearest junction" to use for stop key on a node, what counts as a junction? It's going to be a node which belongs to the current way and at least one other way satisfying certain conditions, but what are those conditions? If we are to use the stop key, I think those conditions will need to be explicitly spelt out, so that you can process the data. One obvious possibility would be ways that have highway=* tags - should footway/cycleway/path crossing count as junctions? If we're going to automagically determine which junction the Stop applies to, why do we even need a new key with yes/both/-1 values? Surely we could just say that if the existing highway=stop tag is applied to a node belonging to a single way (and not an intersection, which has the current meaning), then the Stop applies to traffic on the current way approaching the closest junction. _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
