Export Surfer base map from SHP to DXF with proper Z values

For objects in a base layer, Surfer can use an attribute as the Z value for those objects when exporting to a DXF file, but only if that attribute is named ZLEVEL. If this attribute is called anything else, it is not exported as the Z value for the DXF file. To export the DXF with Z values:

1. Select your Base(vector) layer in the Contents window.
2. Click Map Tools | Layer Tools | Open Attribute Table.
3. In the Attribute Table dialog, select the column containing your z values.
4. Click the Rename Field () icon.
5. Delete the existing Attribute name and enter ZLEVEL.
   
6. Click OK.
7. Click X to close the Attribute Table.
8. Click File | Export.
9. Change the Save as type to DXF AutoCAD DXF Drawing (*.dxf), give your file a name, and click Save.
10. If desired, in the Export Options dialog set the Scaling source to your map, and then click OK.
    

The exported DXF should now contain the proper Z values.

Updated December 2021