> 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
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