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I want to build a DTM. I have extract the ground points from DSM raster by slope base methods and saved in to a raster.tif file.

Now I'm trying to extract ground points from raster.tif as GDAL dataset to use it in the GDAL grid and get my DTM.

But I get this error in using gdalxyz.py:

'gdal2xyz' is not recognized as an internal or external command, operable program or batch file.

What should I do?

2 Answers 2

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Can you be more precise with what you are doing? As I understood, since You already have ground points.

  1. Load Ground Points Vector.
  2. Load DSM model.
  3. Get elevation value from raster to points attributes.
  4. Generate raster/TIN from this points using elevation value extracted above.
  5. You will have your required DTM.
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You need to run GDAL python scripts from within OSGeo4WShell running python with first parameter as path to py script and add script specific parameters behind:

C:\Program Files\QGIS 3.22.6>python "C:\Program Files\QGIS 3.22.6\apps\Python39\Scripts\gdal2xyz.py"

usage: gdal2xyz.py [-h] [-skip] [-srcwin xoff yoff xsize ysize] [-b band [band ...]] [-allbands] [-csv] [-skipnodata] [-srcnodata [SRC_NODATA ...]] [-dstnodata [DST_NODATA ...]] src_dataset dst_dataset gdal2xyz.py: error: the following arguments are required: src_dataset, dst_dataset

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