On Sun, Mar 23, 2014 at 12:39:27PM +0100, Andrzej Popowski wrote:
For example, a parking facility or a building could be tagged both as a point at the entrance, and as an area.
This is against OSM good practice, see recommendations: http://wiki.openstreetmap.org/wiki/One_feature,_one_OSM_element
I do not think that it is a case of defining multiple elements for one feature. If we think of a building, the shape of its outline is one feature, and the location of the main entrance is another. Knowledge of both is needed in order to find a route. You cannot normally walk over or through a building, and you can only enter it via an entrance. Therefore, it could be misleading to route to a POI in the middle of the building outline.
I guess, that it's not easy to reliable detect duplicates. Maybe better correct problem at source?
AFAICT, the source of the problem is the area-to-POI conversion, which does not take into account that a more accurate POI (at the boundary of the area) exists. Marko