Hi Grant,
Are you able to share one of these dxf files containing 3d data?
Note that there are two methods to load DXF in QGIS:
1. drag and drop: uses OGR to load the data - not very good at keeping
symbology
2. Menu "Project" --> "Import/Export" --> "Import Layer from DXF/DWG".
This method uses another library called libdxfrw and imports the DXF/DWG
into a new geopackage file. After that import you are not using the
DWF/DXF anymore but view the data directly from the Geopackage. This
method is much better if you want to keep symbology. It converts blocks
to SVG and does a better job keeping labels than the first method.
Now about keeping 3D information: I am sure that version 1 keeps
z-information. I just tested it and if you use the "Info-tool" you get
3d information in the derived attributes.
I am not sure about the second method. The 3D file I had a hand did not
load with the second method in my case.
Note: until recently, QGIS did not correctly render 3D polylines. Only
3D polygons and multipatch geometries. So if you really want to render
3d linestrings, you need a very recent master for testing.
Hope this information helps - if you could share one of your files, this
would be great.
Andreas
Am 26.08.2018 um 05:21 schrieb Nicolas Cadieux:
Hi,
I have not worked with the 3D in QGIS 3 but I did do some work with
Qgis2treejs a few years ago. As far as I know, you will not be able
for visualise a dxf like you would in a CAD. Qgis was, with that
plugin more like a 2.5D where the ground surface can be modelled with
a raster surface and flat polygons could be extended to make buildings
with a z value. Maybe I did not get to play enough with the plugin
to find the proper functions... maybe QGIS 3 has more built in
function? Not sure but I think you will need a real cad software in
order to see a real 3D structure. There are a few OpenSource CADs,
none of which I would work with professionally :( but they may be good
enough for visualization. FreeCad was one. MeshLab or Cloud Compare
may work with DXF. Not sure.
Please correct me if I am wrong anybody. I would like to be informed
if things have changed.
Nicolas
Le 25 août 2018 à 03:36, Grant Boxer <[email protected]
<mailto:[email protected]>> a écrit :
I am trying to import a 3D dxf for viewing in QGIS v3 either via the
3D window or QGIS2Threejs plugin. Whenever I import a dxf there does
not appear to be any z data imported. Does anyone have any suggestions?
Grant Boxer
Perth, Western Australia
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