On 7 Apr 2009 21:08:48 -0400, "Russ Nelson" <r...@cloudmade.com> wrote: > On Apr 7, 2009, at 12:52 PM, Marcus Wolschon wrote: > >> On Tue, Apr 7, 2009 at 6:22 PM, Florian Lohoff <f...@rfc822.org> wrote: >>> On Tue, Apr 07, 2009 at 11:28:16AM -0400, Russ Nelson wrote: >>>> >>>> Thus, for many roads near me, interpolation is not only usable, it's >>>> technically correct. >> >> Only if every house and intermediate street and garden around the >> house has the exact same exact size. > > I'm not sure how that logically follows from what I said. The street > address is the distance down the road. What does that have to do with > the "exact same size"?
Interpolation happens between a start-node with a given house-number, an end-node with a given house-number. (I'll ignore via-nodes for the time being) Thus every distance(end, start)/(end-housenb - start-housenb) meters it places an address. If it is a very long road and only start+end are given and not all houses have roughly the same size then that means that multiple house-numbers end up inside a very large house, or between houses or even on crossing roads. So it is not automatically correct. You need to place more then 2 nodes in with house-numbers every now and then to make sure house-numbers end up where they are supposed to be. Marcus _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
