On Tue, Sep 29, 2009 at 7:35 PM, Ian Dees <[email protected]> wrote:
> On Tue, Sep 29, 2009 at 6:09 PM, Peter Körner <[email protected]>wrote: > >> > And I believe it has >> > been suggested to use boundary relations rather than polygons in cases >> > where there are a lot of overlapping boundaries. >> >> Yes, I'ts not good to have overlapping ways - they are a mess to edit >> and they can be constructed by relations, as well. >> > > I've been hoping someone would strike up a conversation with me on a good > algorithm to find and relation-ize overlapping boundary ways. I would love > to implement this... > Can we assume the shared ways use shared nodes? I was planning on making that assumption, because I believe it's true for the particular data I'm trying to import. Without that assumption, it's probably too much work for the time I have. In any case, I have to worry about converting the multipolygons from the shapefile I have first. I'm pretty sure there are some, in the standard "holes go clockwise" format, and shp2osm doesn't handle that as far as I can tell.
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