[QGIS-Developer] Loading DXF in QGIS?

[Catania, Luke A ERDC-RDE-GRL-VA CIV]

Assume though the shown variable dwg I am really reading a dxf since readfile did not work on my DWG.  I converted it to DXF using ODA file converter.

I tried it with my dxf but it never went through the loop, so it did not find POLYLINES.  When I bring the dxf  in using QGIS’s Project/Import/Export/Import Layers from DWG/DXF, I see it shows several named layers, but I tried searching on the ones that showed up in the QGIS layer panel  of these and nothing was found.

[cid:image004.png at 01D9F616.D36F2410]

[cid:image005.png at 01D9F616.D36F2410]

From: QGIS-Developer <qgis-developer-bounces at lists.osgeo.org> On Behalf Of Stefan Giese (WhereGroup) via QGIS-Developer
Sent: Tuesday, October 3, 2023 2:59 AM
To: qgis-developer at lists.osgeo.org
Subject: Re: [QGIS-Developer] Loading DXF in QGIS?


Hi,

with ezdxf you can do the job. The following snippet shows how it works:

......

#Reading the dxf and get the modelspace
    dwg = ezdxf.readfile(filepath)
    msp = dwg.modelspace()

    #loop through all Polylines of the DXF
    polylines = msp.query('POLYLINE')
    for polyline in polylines:

       # for example converts a dxf Polyline to a QgsGeometry (Polygon)
       points = []
       for i, location in enumerate(polyline.points()):
           points.append(QgsPointXY(location[0],location[1]))
      polygon = QgsGeometry.fromPolygonXY([points])

.....

hope this will be a starting point for you...

Mit freundlichen Grüßen

Stefan Giese

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Am 03.10.2023 um 00:47 schrieb Catania, Luke A ERDC-RDE-GRL-VA CIV via QGIS-Developer:
I have a DXF in both AC1027 and AC1032 format.  Original file was a DWG.  I converted to DXF using ODA File Converter.  I am trying to load in QGIS and dragging and dropping or using the Data Source Manager results in a layer with the name “entities appended to it and nothing shows up.  When looking at the properties there is not much there. The layer type is a dataset.  I am trying to display all the lines of the dxf.

[cid:image001.png at 01D9F614.283AA0D0]

[cid:image002.png at 01D9F614.283AA0D0]

[cid:image003.png at 01D9F614.283AA0D0]

Now I can use the Project/Import/Export/Import Layers from DWG/DXF to import, but I am looking to do this programmatically in python and I am using ezdxf to assist.

Ideas?








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