Have a look at boundaries.pl in the wiki -- Urspr. Mitt. -- Betreff: Re: [OSM-talk] is_in and similar tags Von: OJ W <ojwli...@googlemail.com> Datum: 28.07.2009 19:33
Could someone[1] setup a web-service where you send it a lat/lon and it returns a list of all boundaries that point is within? So just one website imports the boundary data instead of everyone having to know how to do the 'is within' search[2]. Namefinder could then query this to add its own internal is_in tags to the place= nodes as it's importing them. It might also be quite neat for "describe my location" type things. [1] @lazyosm [2] I assume this is complex, since boundaries aren't guaranteed to contain a single ordered list of nodes? On Tue, Jul 28, 2009 at 2:48 PM, David Earl<da...@frankieandshadow.com> wrote: > Shaun McDonald wrote: >> >> On 28 Jul 2009, at 13:43, John Smith wrote: >> >>> >>> Is there a real need for is_in tags or have admin boundaries replaced >>> the need? >>> >> >> Admin boundaries are the new way of doing this. The is_in tag was the >> early way of trying to show a hierarchy of admin areas. > > It is still *very* helpful to have is_in present though. It is much > easier to present this information in a search than to do polygon tests > which requires a whole new algorithm (desirable though that is), and of > course, boundaries are nowhere near complete, and you often know in > which region a place is without knowing the exact boundary. _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk