I have two carstosat stereo pair images. All i need to do is to extract DEM from those. So, i tried it doing with OSGeo4W. but i didn't succeeded in it.

So IS there any other softwares or opensource for extracting DEM from cartosat pair?

Thanks in advance


There are several softwares for doing this. Here is a non exhaustive list :

Commercial licence :

Open source :

  • Orfeo Toolbox Not tested for photogrammetry, but the modules are there
  • MicMac I've heard of it but never tested. Again, this is more for drone data and not really for satellite data. And not very easy to manipulate...
  • Thanks for your answer, and i would like to ask that is there any other open source rather than Orfeo Toolbox? and i will look in to this commercial softwares if i have to. I am using this Orfeo Toolbox but iam facing errors for the data i have. iam working on that.
    – Sandy
    Jan 10 '14 at 14:24
  • I've added one more. Otherwise there are of course other OS remote sensing software (BEAM, GRASS) but they do not have photogrammetry module from what I know.
    – radouxju
    Jan 10 '14 at 14:45
  • @ radouxju I had a doubt that do the Images need to be orthorectified before doing the Dem extraction?
    – Sandy
    Jan 11 '14 at 12:09
  • @Sandy For the creation of a DEM (in fact a DSM, digital surface model) with a stereo pair, you need to have the original images in the sensor geometry. You then create an epipolar pair of image based on the geometry of acquisition (at this stage, you can visualize your data in 3D), then you extract the DEM (your software has to find homologous points based on some correlation tools). It is only after those steps that you can create a true orthorectified image. If the 2 images of your stereo pair are already orthorectified, you cannot extract a DEM.
    – radouxju
    Jan 11 '14 at 13:08
  • @radouxju from the pair of images i have how do i know they are orthorectified?
    – Sandy
    Jan 13 '14 at 9:11

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