OpenStreetMap
Does anyone have a plane table application for geo-coded digital photographs?
What I was thinking of (having used a plane table in the ancient past) is something that takes two GPS-coded photographs of the same (or overlapping) scene, and works out angles, distances and heights of visible objects from the baseline length and exif camera data.
Like stereoscopy but for mapping not entertainment.
Doesn't look like the plugins for editors do that sort of thing.
To me, getting building heights is difficult without this sort of thing.
It seems like the opposite of hugin panoramas.
Diskussion
Kommentar von Chaos99 am 8. Oktober 2011 um 18:55 Uhr
There are plugins that do this, but not for OSM (or JOSM).
I know of a (commercial) plugin for Google SketchUp (http://www.brainstormllc.com/) which extracts building dimensions from photos.
If you match points manually, SketchUp can do the same without a plugin.
But this will produce 3D buildings. I don't know of any tool that only extracts heights, sorry.
There is a Microsoft project (http://en.wikipedia.org/wiki/Photosynth) (available as a web service) which combines photos of different view angles into a point cloud. Also technically the same as what you ask for, but of no use for OSM, sorry.
Kommentar von robert am 9. Oktober 2011 um 19:58 Uhr
osm.wiki/Photogrammetry
Kommentar von paulbiv am 9. Oktober 2011 um 21:52 Uhr
Don't think I'd ever have found the photogrammetry page.
Looks like what I'm looking for is a small part of the osm-bundler functionality - but I think I'd want to go closer to an osm editor than via blender (which I don't know either). Looks like a very interesting approach. Apart from building heights (the main use case) my use case is identifying field boundaries (barrier=hedge, etc) from taking photos from nearby high ground.
Kommentar von zors1843 am 10. Oktober 2011 um 06:22 Uhr
Could this be interesting to you ?
http://sotm-eu.org/talk?27