[Qgis-user] IR-airphoto and 3D

[Stefan Kiefer]

Hi Johan,
What you are looking for is grass indeed. But I belive what you trying
to do is quite in vain. It would be much easier to get a DEM and drape
the IR-Photographs over it. This all is very easy to do with Grass and
nviz. Watch
http://grass.itc.it
you will find all the links and hints to tutorials and manuals for doing
this.
If you have no DEM (I guess because you aks your question ...) youl will
find the GLOBE projekt where you can get a world covering DEM of 30 arc
seconds which results in a one kilometer elevation model:
http://www.ngdc.noaa.gov/mgg/topo/globeget.html

there are also some tools for that data. As far as I remember grass is
able to directly import GLOBE-Data

hope that helps you.

cheers

Stefan
Am Montag, den 26.04.2010, 15:01 +0200 schrieb Johan Nilsson:

> I have very little knowlight of terminology in this area.
> 
> Is there a possibility if you have 2 semi-overlapping IR-photo, with
> known flight-altitude, distance between picture, camera-model and
> pictures corners coordinat, to make a 3D model with height-data?
> 
> To use 2 pictures to get "stereo-vision", requere quite special
> dual-screens and gfx-card and polaroid-glasses, so to skip this, are
> there some other software that can pick altitude for every pixel in
> the area  there 2 IR-photo cover?.
> 
> If not QGIS have this, is there any other open source-applications to
> use, for instance GRASS that manage this, and what is the name of the
> process to make a 3D-map from at leaste 2 airphoto in GIS-terminology?
> 
> /Cheers
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