I'm in London and using the method, linked to by Kevin, the VectorDistrict looks very good. I also converted to kml to see how some some of the old docks near sea level matched up in google earth and I was more than happy. Overlaying Vector District and 'StreetView tiles' in Josm indicates the Streetview tiles can be off in places
Jason On 30 May 2010 10:09, Kevin Peat <[email protected]> wrote: > I'm in Devon and I see the same thing although whether it is just the SW I > don't know. > > The Streetview tiles (as I see them in JOSM) are all offset to the SE by > 5-10 metres. I've converted some woods in my area from the VectorDistrict > data using this process, > > http://wiki.openstreetmap.org/wiki/Using_OS_Shapefiles > > and the converted data looks good to me compared to my previous surveys but > comes out different to the tiles, so I'm thinking that the tiles are wrong. > > Kevin > > > > > > On 30 May 2010 09:08, Tim François <[email protected]> wrote: > >> > On a side note, has anybody noticed a consistent tendency >> > for existing >> > independently surveyed roads to be offset northwards (by >> > around 5-10 >> > metres) from the OS data (vectormap and streetview)? I've >> > seen various >> > cases of existing roads being edited to be consistent with >> > OS data, >> > but I'm not convinced this is a good idea since the problem >> > seems to >> > be consistent in one direction. >> >> Glad I'm not the only one. Here in the SW I see the same offsets, although >> I find the VectorDistrict data to be more like the GPS surveyed data. This >> means that the StreetView tiles do not match up with the VectorDistrict >> either: I've been importing some rivers and reservoirs from the >> VectorDistrict data (namely the River Chew and Chew Valley Lake) and I've >> found that the polygons seem to be shifted compared to the equivalent >> positions in StreetView by about 10 metres. >> >> I guess this is an expected artifact of the reprojection methods? >> >> Tim >> >> >> >> >> _______________________________________________ >> Talk-GB mailing list >> [email protected] >> http://lists.openstreetmap.org/listinfo/talk-gb >> > > > _______________________________________________ > Talk-GB mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/talk-gb > >
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