Please excuse me if this is a FAQ, I just didn't find an answer in the wiki (possibly because it is obvious) ...
In topological GISses like grass, borders are shared between adjacent (vector) areas. However, I wonder how adjacent areas should be digitized in OSM (let's say, forests and farmland, or riverbanks and the associated wetlands). Am I right in assuming that OSM ways always belong to one single area? If this is so, do I have to duplicate ways along the common border? JOSM informs about double ways when it validates data so I had the slight impression that they are not really wanted. I see a similar problem with line data (e.g. roads, streams) which may happen to be an area border. From reading http://wiki.openstreetmap.org/index.php/Editing_Standards_and_Conventions#Tagging_Areas I think that using a street as a border of a plaza (or a block of buildings) is not wanted. Does one digitize double ways, leading along the same nodes, or does one make a separate area in a small distance to the existing line (street/stream), which might be topologically incorrect and is more difficult to maintain? Thanks for your advice! Ulf -- Ulf Mehlig <[EMAIL PROTECTED]> ----------------------------------------------------------------------- _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
