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Importing a DXF File

The Stope Section boundary, or a polyline/polygon tool can be imported into CPillar from a DXF file (AutoCAD Drawing Exchange File) using the Import DXF Import DXF icon option.

To import a DXF:

  1. Make sure the Stope Section Stope Section icon view is selected.
  2. Select File > Import > Import DXF or use the right-click menu.
  3. You will see an Open File dialog.
  4. Select the required DXF file and select Open. You should now see a preview window of the boundary you are about to import. By clicking on Boundary Type, you can assign the DXF Layer as a Stope Section, or a Polyline / Polygon Tool, which can be used as guidelines for the geometry.
  5. Click OK. The coordinates of the boundary will be imported from the DXF file into CPillar.
If your DXF file is not importing correctly, there may be several reasons for this. See the notes below (Problems with DXF Import) for possible causes and solutions.
  • The Import DXF Import DXF icon option is an alternative method of creating the Stope Section boundary in CPillar.
  • The Stope Section boundary can also be exported from CPillar to a DXF file using the Export DXF Import DXF icon option.

Problems with DXF Import - Stope Section

If your DXF file is not importing correctly (e.g., if the wrong boundary appears, or no boundary appears and you receive a warning message), remember:

  • The Stope Section boundary in CPillar must always be CLOSED (i.e., first vertex = last vertex).
  • Only a SINGLE boundary (pillar stope) can be analyzed. You cannot define, import or analyze multiple pillar stope geometries within the same CPillar file.

If you are having trouble with Import DXF, one of the following reasons is the likely cause of the problem:

  1. Multiple Closed Boundaries: If your DXF file contains more than one closed boundary, CPillar has no way of determining which boundary you want to import. In this case, CPillar will import the first closed boundary which is encountered in the DXF file. If this is not the correct boundary, then you must create a new DXF file which contains only the boundary you wish to import. To do this:
    • In AutoCAD, use the DXFOUT command, select Tools > Options > DXF options. Select the " select objects" checkbox, and select the desired boundary.
  2. Incorrectly Closed Boundaries: Another possible scenario, is a DXF file which does not contain any boundaries which are defined as CLOSED (in the DXF boundary definition). In this case, CPillar will examine the boundary(s) which exist in the DXF file and attempt to determine if a closed boundary exists (i.e. first vertex = last vertex). If this is not successful, CPillar will check to see if a combination of individual boundaries forms a single, closed boundary.
    • In this scenario, problems can occur when vertices at the endpoints of boundaries, are not exactly equal (i.e., vertices which should be exactly coincident, actually have slightly different coordinates, for example, after a drawing has been graphically digitized).

If CPillar cannot successfully create a closed boundary from the vertices in the DXF file, then the only solution is to examine the DXF file in AutoCAD, and ensure that the endpoint vertices of the relevant boundary(s), are exactly coincident. This may require zooming in to view the boundary vertices, and moving the boundary endpoints so that the endpoint vertices are exactly coincident, and form a single, closed boundary. CPillar should then be able to read the DXF file.

The Import DXF option is only available when performing an analysis using a Polygonal Shape pillar. If you are importing the Stope Section boundary from a DXF file, it will overwrite the existing Stope Section geometry.
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