OpenStreetMap

Align those overhead photos, folks!

Posted by AndrewMcCarthy on 11 April 2008 in English (English)

A lot of the time overhead photos from various sources aren't perfectly aligned, and may be off by 50–100m. Please make sure to align them by comparing features in the photo with actual GPS tracks in JOSM (or whatever you're using) before you trace rivers and buildings. :)

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