Hi! In the last days the OpenStreetMap Carto Style 4.0 is being deployed on the OSMF tile servers. This new version of the style doesn't take old-style multipolygons (where the tags are on the outer ways instead of on the relation) into account any more. In a huge effort in the last months we have removed old-style multipolygons from the OSM database completely, so this is a good step!
Unfortunately nobody really realized that as a side-effect of the update to Carto 4.0 many multipolygon relations would appear wrong on the map. This is the case for multipolygon relations that have the same tags on the relation as well as on (some of the) outer or inner ways. This is *wrong* tagging, and needs to be fixed. Note that this always was wrong tagging, even before we deprecated old-style multipolygons, but the way the software worked with old-style multipolygons, this problem was not visible on the map. Here is an example: http://www.openstreetmap.org/relation/1330741 . As you can see (unless somebody fixes this :-) the clearing in the forest that should just have grass, also has tree symbols on it. In many other cases it is not this obvious, there are just islands in a river missing or so. There are about 50,000 cases like this, forests, waterways, all sorts of areas. Worst offenders are about 15,000 relations from imports in Canada and 8,000 relations from imports in New Zealand. Please help fixing these. As part of the "area fixing effort" I have started to create Maproulette challenges for these. Go to http://area.jochentopf.com/fixing.html for more information and read the detailed news about this effort at https://github.com/osmlab/fixing-polygons-in-osm/issues/15 . Jochen -- Jochen Topf joc...@remote.org https://www.jochentopf.com/ +49-351-31778688 _______________________________________________ talk mailing list talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk
