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
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