Dave Stubbs wrote: On 20/12/2007, Rahkonen Jukka <[EMAIL PROTECTED]> wrote:
>> Hi, >> >> Some area features would be drawn in GIS world as polygons with holes but >> that is not well supported by OSM data model. I mean, for example, landuse >> which has islands with some other landuse or big buildings having inner >> courts or patios. I have seen that users have solved this in many >> innovative ways but most of them seem to lead to more or less odd rendering >> at least in case of buildings. Is there any recommended way to draw and tag >> this kind of objects? To draw an area in the halves, or delineate a >> building as a fat loop sharing some points at a seem (non-existing in real >> world) to make it look like a closed area, or what? > Use the multipolygon relation. > It'll be rendered by the Mapnik layer at least. > http://wiki.openstreetmap.org/index.php/Relations/Multipolygon > Unfortunately you can't do that in Potlatch yet, so you'll need to be > using JOSM or some other editor which supports relations. Thanks, I will learn to use that. -Jukka- _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk