On 14/01/2008, 80n <[EMAIL PROTECTED]> wrote: > > On 14/01/2008, Alex Mauer <[EMAIL PROTECTED]> wrote: > > > Robin Paulson wrote: > > > > the point i'm trying to get across, is that all water features, be > > > > they linear (rivers, canals, stream) or areas (lakes, reservoirs) or > > > > whatever would benefit from being under _one_ top-level tag, for > > > > consistency. > > > > > > Hmm, are you sure? Is it easy for a renderer to differentiate a linear > > > feature from an area without a distinct tag? I don't think it could be. > > > > yes, of course - in exactly the same way as you can differentiate a > > square, triangle or circle drawn on paper, from a line > > > > areas must form complete loops, otherwise they are treated as ways by > > the renderer > > > > This is not true. Osmarender does not require areas to be closed in order > to render them. It automatically joins the last node to the first node if > it has been asked to render an area.
ok, that's interesting, i didn't know that. why does it do that, and can anyone comment if mapnik is the same? getting back to the original point: this won't cause a problem - if all items tagged waterway=lake are added to the renderer rules as areas or nodes (and only areas or nodes), and all items tagged as waterway=rivers are added as ways (and only ways) then the renderer will be able to handle them appropriately. from what i can see, wide rivers are tagged with riverbanks, similarly to coastlines, so there's no ambiguity there either _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
