[QGIS-Developer] Loading DXF in QGIS?

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

I tried the code but it never went through the loop, since 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.

When those imported there were three groups 0, MP.RSRC.CONDAIR, MP.SL and those respectively have layers polylines, hatches, polylines.  I tried searching on the group names as well as the lower case polylines layer and the query did not return anything.


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 01D9F61D.2858E820]

[cid:image002.png at 01D9F61D.2858E820]

[cid:image003.png at 01D9F61D.2858E820]

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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