Dave Clark wrote: > Using Yahoo maps directly, the "satellite" images have various > copyright attributions. Images for my area indicate copyrights > attributed to Aerials Express and i-cubed. Images in the UK are > attributed to i-cubed and GeoEye. There's a generic attribution to > Yahoo! Inc. on all of them. Yahoo has a personal-use only caveat in > their terms of service, I am unaware of the license agreements as > to the > images themselves.
Very very roughly, AIUI: the aerial imagery providers give a right to their customers (Yahoo included) to create derivative vector works. Yahoo has sublicensed this right to us. Their lawyers have checked this out and they're happy with it - and the OSM/Yahoo agreement has had sufficient publicity that, if the imagery providers had problems, you can bet we'd have heard about them by now. To answer the original question, though, trust your GPS over the imagery. The imagery may not always be rectified, whereas as long as your GPS has produced a good-quality track - i.e. no "concrete canyon" distortions - it should always be accurate. cheers Richard _______________________________________________ newbies mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/newbies
