[OSM-talk] Defective GPS trace

[John Smith]

2010/1/2 Aun Johnsen <lists at gimnechiske.org>:
> Even if you have access to good arial photography, remember that it might be
> out of alignment, it can be a good advise to gather some good fixes to check
> the alignment of your photos, this can be several GPS tracks along your
> trail.

I'm pretty sure the imagery he's refering to is nearmap.com, which I'm
not sure how they manage it exactly but they seem to be about
sub-metre accuracy...