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How-to Convert DXF to QXF

This document describes how to convert a DXF background that is in projection coordinates to a Lat, Long WGS84 QXF file.

First you will need the set up a database with Geodetic Settings (1.1)
Once a database is created you can convert the DXF files to QXF files (1.2)

1.1 Setting up a database

To be able to convert the DXF background that is in Easting, Northing, Height projection coordinates to Lat, Long WGS84 you need to create a database that contains the geodetic settings:

  1. Start ConvDxfQxf.exe from the Windows Start menu
  2. Select an already created database or create a new one:
  3. Select a “Predefined Coordinate System” or select the Ellipsoids you wish to use:

    (Ellipsoid used for ENC coordinates is WGS84)
  4. If only one ellipsoid is selected because the DXF is projected directly from WGS84 , then go to step 5
    If multiple Ellipsoids are selected you need to enter the conversion parameter on the next (=second) page.
    1. Select both the Ellipsoids used for the projection and the one used for the ENC charts WGS84

      (ETRS and WGS84 can be assumed equal when GNSS corrections used, originate from reference / base station(s) set up with ETRS89 coordinates)
    2. Select the ENC datum to the Projection datum and enter the transformation parameters

      In this case ERTS=WGS84 and the DXF is in the Dutch National grid coordinates projected from the ED50 onto a Stereographic Projection.
      After you entered the conversion parameters you need to select “Next>.”
  5. If only one Ellipsoid is selected you will skip the transformation parameter page and directly end up at the Survey Datum (= Target Datum before projection) page.

    Select the required:
    1. Horizontal Datum (= Target Ellipsoid) of DXF drawing.
    2. Vertical Datum (= Vertical Height Reference = Chart Datum) can be left empty.
  6. Select the Projection and zone of the DXF coordinates:
  7. Select the settings of the Local Construction Grid if applicable and click on “Finish”
  8. Test the if the Conversion settings are entered correctly under Options:
  9. Save the created database file under the active Qastor Project in the Database folder



    1.2 Converting a DXF

  10. Select the database file you created:

    Select OK.
  11. Open the DXF (ACAD2000 or earlier):
  12. Check if the colors are converted correctly and convert the DXF to a QXF:
  13. Click on “OK“
  14. Start QASTOR or QINSy-Online and check if the DXF was converted correctly:
  15. For more details regarding the conversion and line colors of DXF to QXF please read 'QXF Conversion details' in the ConvDxfQxf online help.
  16. Tips to sync the colors between DXF and QXF
    1. Create a drawing, in your AutoCAD / BRICSCAD / Microstation / Terramodel package, with vertical lines and give the lines the color numbers 1-16
    2. Convert the file to a QXF and check which pen number results in which color, see picture below: