Paul wrote: > Jerry, > > No worries. I think I'll still pop down for a survey anyway because I now > want to > try the GPS + car trick and see how it turns out. We'll compare changesets > later :)
Much of Clacton was originally mapped using that method, when there was no imagery covering the area. https://www.openstreetmap.org/user/EdLoach/traces/page/79 When imagery and OS opendata became available it was usually pretty close. I was using (and still use) a Locosys GT-31. I have seen areas where the uploaded traces and the OSM roads seem to follow the pavement in the imagery and suspect it was mapped by a walker who hadn't adjusted for not walking down the middle of the road (I'm not talking a constant offset here as it depended which side of the roads they were walking). Accuracy will depend on the receiver and signal reception. Ed _______________________________________________ Talk-GB mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-gb
