how can we create a DEM in QGIS from point data in CSV files? A similar problem was discussed here, using a shp-file. Our CSV's are too big, so that dxf2shp crashes. So we are looking for another way to do this.
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Had the same issue some time ago and used GRASS GIS sucessfully, as proposed by the answer to my question here: gis.stackexchange.com/questions/140683/…– ulrichMar 1, 2016 at 14:42
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"Our CSV's are too big, so that dxf2shp crashes".A dxf and a CSV are different things. Try to load your points with the add delimited text layer option, assing the proper coordinate system and save your points as a shape file (I am assuming they have some sort of z value). The you can use the interpolation option in the raster menu– Gerardo JimenezMar 1, 2016 at 18:01
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@tareq: Thanks a lot. But ... too many errors while installing GRASS. I just found it why: CURRENT GRASS BINARIES MAY NOT WORK WITH EL CAPITAN - OS X 10.11.... So I have to search for a solution with QGIS...– HaraldMar 1, 2016 at 18:14
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are you able to install SAGA GIS on El Capitan? If so, it should let you do this quite easily. Also, what do you mean by a large file, how many points (lines)?– Steven KayMar 1, 2016 at 23:08
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@StevenKay: There are more 100k lines. If I convert it to DXF, then the DXF is more than 300 MB... SAGA GIS: I try to install it right now, using fink, but I can see a huge amount of warnings ....– HaraldMar 2, 2016 at 14:40
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1 Answer
While I can't be certain without seeing your files and knowing the number of lines etc. you should be able to do this using the gdal_grid utility.
answered Mar 1, 2016 at 15:54
