Hello I have recently had a small edit war with user nondidju regarding my tracing of sidewalks as separate ways, see http://www.openstreetmap.org/browse/changeset/7461451 http://www.openstreetmap.org/browse/changeset/7528743
He argues that the mapnik rendering of this show how irrationnal it is (which is a personnal preference on which I differ) and that those should be tagged on the main way. I personnally think that it is more topologically correct, having a parallel footway (where there exists ont) and foot=no on the main road, as on important roads you may not cross anywhere, but only where a crossing exists, so a separate way allow for correct routing for pedestrians. As an example, on this way http://www.openstreetmap.org/browse/way/57687924 you may simply not cross the road between the bridges. (I don't create parallel footways for every road, only those where I consider it unwise to cross anywhere) Another example http://osm.org/go/0EqqLNEt0-- Here you may not cross the road on sides of bridge "Albert 1er", you may either take the tunnel on the right side, or go to the traffic signal on the left. >From a recent discussion on newbies@ http://lists.openstreetmap.org/pipermail/newbies/2011-March/006340.html it seems the recommanded way to tag those is to use a footway tag on the main road, but with this, routing engines have to do a preprossing to recreate the topologically correct ways, or have a more complex algorithm taking into account on which side of the road you are walking and where you way cross. And the problem is harder for roundabouts, see for example this one http://osm.org/go/0B964M9V@-- and his brothers along the motorway http://osm.org/go/0B965o7BK-- how would that be represented with only tags on the roads? This will end up splitting the ways many times. Now, I agree that bridges don't look very well on the rendering, but that is already a problem when you have separated roads on the same bridge (see previous link), and that is a renderer problem, maybe missing a "bridge bed" information to know that the ways share the same bridge. I saw a related discussion some month ago, but I don't this it ended with a way to tag it. I didn't find anything related on the pages of WikiProject Belgium (but I may have missed it). So I would like to have your thought and opinions on the matter. I think tracing ways to represent sidewalks for roads you should not cross anywhere adds valuable informations, bu if everybody is against it I will retag it as footway=left/right/both/none where appropriate. cf http://wiki.openstreetmap.org/wiki/Proposed_features/Advanced_footway_and_cycleway thank you -- Renaud Michel _______________________________________________ Talk-be mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-be
