On Wed, Oct 25, 2017 at 12:50:40PM +0300, Tomas Straupis wrote: > Hello > > For a long time I wanted to hear opinion on the topic of topology rules. > > By "topology rules" here I mean just simple rules such as: > * polygon X should not overlap polygon Y > * polygon X should always be above polygon Y > * point X should be not further from line Y than D > etc.
you are thinking too abstract and trying to do too many things at a time. > * it would be easier for cartographers or the like. They would not > have to guess which polygons should be above which ones in drawing > order, for example when creating garmin maps it is not always possible > to control the order of layers, so we have a question which goes > first: forest or water? quite clearly described here: http://wiki.openstreetmap.org/wiki/Key:layer#Data_consumers Water and forest is allowed to overlap. OSM landcover model is insufficient and mildly broken. Fixing it is not so easy. Richard
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