I like the idea of formalizing OSM topology! An example: power lines should share nodes with nothing except power towers, portals and buildings (substation buildings).
A problem i find is with landuse=forest. Formally, those are zones that are used for growing trees. But practically in OSM, that tag is used for any land that is covered with trees. So formally, landuse=forest shouldn't overlap with other zones, but practically, until a new tag (landcover=trees) is rendered, this rule isn't going to be followed. Janko sri, 25. lis 2017. u 18:41 Martin Koppenhoefer <dieterdre...@gmail.com> napisao je: > > > sent from a phone > > > On 25. Oct 2017, at 17:36, Gaurav Thapa <gthapa.w...@gmail.com> wrote: > > > > In Nepal we have been trying to make sure that each constructed building > has its own footprint and is not connected to a neighbouring structure via > a shared wall. We do this as in reality this is the case as each building > structure though built next to each other has its own footprint > (independent foundation). > > > yes, you can find both situations: a single dividing wall used by both > neighboring buildings (in Europe this occurs mostly with medieval > buildings), or each building has its own walls (and foundations), but > without a significant space between them (e.g. 2 cm of insulating material). > > I would treat both situations the same and use shared nodes, but maybe > wouldn’t object if someone purposefully mapped the latter as 2 > almost-touching buildings, although the osm building ways usually describe > the footprint of the completed building (i.e. with facades, cladding etc.) > and not the raw load bearing structure. > > cheers, > Martin > _______________________________________________ > talk mailing list > talk@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk >
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