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How To: Asc-file to DEM?

Question asked by csmidtHB on Feb 12, 2015
Latest reply on Feb 16, 2015 by xander_bakker

I've got an aerial photo as a asc-file and  generated an txt-file with the x,y, and z coordinates of this asc-file. My task is to generate a DEM from this data but I don't know really what to do next. Can you help my to generate the 3D DEM? Or give me a link for a step-by-step Instruction?