Minko (ligfietser@online.nl) wrote:
I have enabled the add-pois-to-areas option, because this way I can search for a certain tag that is placed on an area like landuse=*, tourism=* or building=yes. But sometimes those pois are cluttering the map, especially if this area is a type=multipoygon relation.
Take for example this multipolygon relation: http://www.openstreetmap.org/browse/relation/949481 tourism=zoo is tagged only once on the outer way: http://www.openstreetmap.org/browse/way/61046378
However, the multipolygon function of mkgmap splits this area up in several parts (to render the inner islands, which is fine) but it also creates too many pois by the add-pois-to-areas for this one tourism=zoo area: http://img546.imageshack.us/img546/5763/zoow.jpg
I'd like to see just one elephant icon instead of several. Is it possible to execute the add-pois-to-areas action before the multipolygon action takes place? Or is it possible to set some rules in the style file to make some exceptions for areas with type=multipolygon?
This is a known issue (http://wiki.openstreetmap.org/wiki/Mkgmap/known_issues#Too_many_POIs_for_a_g...).
WanMil had a look at it a few months back and concluded that there wasn't a quick fix (http://www.mail-archive.com/mkgmap-dev@lists.mkgmap.org.uk/msg07431.html).
I would really like to see this bug fixed as it can add many duplicate POIs to a map.
Maybe it's not be too difficult to fix that. Here is my idea: Just before the style conversion one point for each polygon is added with a copy of all tags plus mkgmap:poly2poi=true. Polygons contained in or created by a multipolygon are excluded but additionaly one point for each multipolygon is added. Now the rules in the points style are applied automatically. Sounds too simple...? Any objections to such a solution? WanMil