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I was wondering if anyone knows of an open source, perferabily something for QGIS and not GRASS, that can be used for orthorectifying scanned archived air photos. I have looked at OSSIM and a few other packages, but they do not allow (from what I can tell) for a single image to be processed based on user input from a geoimage or vectors. Packages like ERDAS and PCI allow for this, but I am looking for an open source solution. The Georefrencer plugin to QGIS is good, but I would like to be able to use a DEM (digital elevation model) as a source for the Z information for terrain relief issues.

Any help would be great, or clarification on OSSIM or other products that I may be misunderstanding.

Thanks.

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What do you mean by "use a DEM in the calculation"? –  MLowry Aug 22 '12 at 16:38
    
What I mean is have a DEM (digital elevation model) as a source for the Z information. Without the use of a DEM it really isn't an ortho. Not using a DEM and only using a Polynomial transformation is really just rubbersheeting. This is possible with the GeoReferencer plugin in QGIS, but it lacks the association to the terrain (DEM) for relief issues. –  Ryan Garnett Aug 22 '12 at 17:33
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2 Answers 2

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You could try AirPhotoSE - it's free but not open source - which is part of BASP (The Bonn Archaeological Software Package). It's designed for Windows, but it should work well under Wine on Linux.

I believe the author, Irwin Scollar, is intending to make the full version of AirPhoto open source in the near future, but I've not got any dates for it yet.

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You might like to have a look at the GeoRect tool that comes with FalconView

Probably windows only, but LGPL.

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Bookmarked that one! +1 –  MerseyViking Aug 22 '12 at 22:11
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