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I am new to all of this and I would like to know if it is possible to convert .xyz to .dxf in QGIS? I heard that it is possible in ArcGIS but I am not sure about it in QGIS. (I hope I am right asuming that an Ascii file is .xyz?) My problem is that I have to convert a digital terrain model (DGM in German) to .dxf but I have actually no idea how to do it and how it should look like. When I just open it, I get the following image (and my computer gets pretty slow...): enter image description here

I saw that I can save it as .tiff, but there are no more options to choose from.

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.xyz is a raster format, while .dxf is a vector format. Since your data is digital elevation, I assume you want contour lines in your .dxf file.

So you have to run Raster -> Extraction -> Contour, selecting an output filename and Autocad DXF file format, and a suitable contour interval.

Unfortuantely, the module always creates a shapefile output. So you have to click on the pencil next to the large input box above the OK button, and enter -f DXF before the filenames to get the desired format.

You need to activate the Attribute name to get elevation information as a line attribute.

See https://hub.qgis.org/issues/6695 and https://hub.qgis.org/issues/13068 for those caveats.

  • Thanks a lot! Where do you mean that I have to enter -f DXF? I just choosed the output file format as Autocad DXF and now when I look in the properties the layer source shows .dxf. Is that also right? – user68977 Mar 21 '16 at 10:13
  • And is it normal that there is no information? I mean in the attribute list? It’s the first time that I see something like this, so I have no idea if its right and you have to introduce it manually now or not... – user68977 Mar 21 '16 at 10:14
  • Did you get a DXF file or a folder containing dbf/prj/shp/shx? The second would be a shapefile, with little use in CAD software. You need to activate the Attribute name to get elevation information as a line attribute. – AndreJ Mar 21 '16 at 12:43
  • You are right. I got a folder containing dbf/prj/shp/shx. So I tried it again as you said and this time I got a DXF folder. Now I will try to get the elevation information as well! Thanks a lot for your help! – user68977 Mar 21 '16 at 13:26

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