During my editing sessions, I've found that May 2015 imagery (ie: Digital Globe) is often distorted, due to high shot angle and/or missing orthorectification.
In mapping pre-disaster we use "old" Bing and Mapbox imagery, that I suppose have been filtered and processed for a better 2D representation. I noticed that many pre and post EQ edits are misaligned (from few to 100 meters) causing collapsed building brownfield to be away from pre-EQ building. When needed, JOSM users should take Bing/Mapbox as a reference and align unprocessed imagery on a local basis, say 500meters canvas. Having toggable pre and post EQ also reveals other disaster elements, like landsides. ----- -- cascafico.altervista.org twitter.com/cascafico -- View this message in context: http://gis.19327.n5.nabble.com/Nepal-EQ-On-the-fly-imagery-misalignments-tp5845376.html Sent from the Humanitarian OpenStreetMap (HOT) mailing list archive at Nabble.com. _______________________________________________ HOT mailing list [email protected] https://lists.openstreetmap.org/listinfo/hot
