2010/8/29 Pieren <[email protected]>: > On Sun, Aug 29, 2010 at 11:37 AM, Nathan Edgars II <[email protected]> > wrote: >> >> Perhaps a site relation? I'm not sure it's necessary; any application >> that needs that information can calculate whether the polygons >> overlap. >> > > Yes, the topology shows what is "inside" or "outside" the polygon. And you > can use the tag "layer" to say what is on the top of what.
+1, but site-relations might still be useful in the context of power generators. There are situations where the single objects do not overlap but are side a side, for example you might have 3 generators with 3 chimneys and want to model which chimney is connected to which generator. cheers, Martin _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging
