Steve wrote: > I was under the impression that the local authorities generally > used an OS > base map, so their own data may well be derived from the OS > data.
A few years ago now (5 or 6) the bungalow next door was knocked down and two put on the plot in it's place. After they were built, an OS surveyor knocked on our door to ask permission to survey the new properties relative to ours (to give him the known fixed points on their existing data), which he surveyed entering the information straight onto a touch screen device and could presumably have been uploaded directly to the OS database if it had some sort of mobile data connection. I'm not sure this project currently supports that kind of accuracy, though perhaps if accurate GPS devices (there was something on TV about a harvester which drives itself to within 1 inch accuracy), and/or low level aerial photography become widely available we could aim towards it. I suspect for some users this accuracy is probably important. Ed _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
