OpenStreetMap

Plane table application?

Posted by paulbiv on 8 October 2011 in English (English)

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.

Comment from Chaos99 on 8 October 2011 at 18:55

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.

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Comment from paulbiv on 9 October 2011 at 21:52

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.

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Comment from zors1843 on 10 October 2011 at 06:22

Could this be interesting to you ?

http://sotm-eu.org/talk?27

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