[OSM-talk] Imagery parallax error in high altitude areas
Russ Nelson
nelson at crynwr.com
Tue Apr 10 04:01:52 BST 2012
Nathan Edgars II writes:
> It's not as bad as it seems. Imagery is adjusted using an elevation
> dataset. Since this data doesn't (and shouldn't) include buildings and
> bridges, these appear distorted. You'll also see problems where recent
> heavy construction has caused changes in topography.
Or where the elevation dataset doesn't include a deep canyon, which
causes a straight bridge to appear curved. If it's a railroad, you can
be pretty sure it isn't. If it's a road bridge, you have to rely on
what you saw when you were there.
--
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