[OSM-newbies] Trust GPS or Yahoo aerial imagery?

[Gervase Markham]

Rick Collins wrote:
> If your data deviates from the Yahoo images only for part of the 
> track, then I would say to correct the data.  But if it is 
> consistently off you might want to verify against a different image source.

It's consistent. See the strange fork of streets:
http://www.openstreetmap.org/edit.html?lat=51.64010344659761&lon=-0.14455487526150118&zoom=17
(Zoom out one to get the Yahoo imagery to appear.) It's easiest to see 
on the upper one.

Gerv