On Fri, Jan 15, 2010 at 17:27, Andy Allan <gravityst...@gmail.com> wrote:
> The imagery isn't rectified using ground control points obtained via > GPS units, if that's what you're asking, so no, it's not going to be > 100% accurate. I'm not certain what was used to rectify it, but I > suspect either Yahoo imagery or OSM data itself. > > If you find an area where all the OSM data is off by a fixed amount, > then don't worry about moving the data, move the imagery instead. And > don't worry about it overly much, since anyone on the ground with a > GPS unit will be able to cope with a 5-10m displacement. have a look here: http://www.openstreetmap.org/edit?lat=18.542645&lon=-72.337311&zoom=18&tileurl=http://maps.nypl.org/tilecache/1/haiti/!/!/!.png (the 2 circles in the center of the image) or here: http://www.openstreetmap.org/edit?lat=18.546683&lon=-72.349488&zoom=18 (coastline) -- -S _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk