Hello Martin,
If your DTM raster is in *.bil or *.asc format then you can use LAStools' > las2iso or blast2iso from the LiDAR Processing toolbox. > Ok. :) But, my DTM is a simple GeoTIFF. :( Do you know if gdal permits to create curves from a GeoTIFF DTM, clipped by a rectangle BBOX ? Perhaps, I need to clip my DTM, before, with the "gdal_translate" and then send the result to "gdal_contour" ... There is no way to do it in a single shot ? :) Who knows ? Thank you Roberto
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