Rose Diagram

The Rose Diagram tool (Geotechnical tab > Analyse group) plots the frequency of data against the direction of the data. Rose diagrams help to identify directional trends in the data.

Before creating a rose diagram, you must prepare stereonet data from discontinuities. See Create Stereonet > Create Stereonet.

Once you have the data prepared, follow these steps to create the rose diagram:

1. Highlight all the created discontinuities in the project explorer.

2. On the Geotechnical tab, in the Analyse group, click Rose Diagram.

   

3. Select the Plot type from the drop-down list:

   • Strike direction plots the strike direction of the planes.

   • Dip direction plots the dip direction of the planes.

   • Trend direction plots the trend direction of the planes.

4. Specify the Number of angular divisions required in the diagram (range 2-360).

5. (Optional) Select Terzaghi weighting if required. Terzaghi weighting uses the measurement orientation to counteract sampling bias. Configure weighting parameters as follows:

   1. From the Type drop-down, select the required weighting method:

      • Planar gives bias to discontinuities less likely to intersect the specified plane.

      • Linear gives bias to discontinuities less likely to intersect the specified line.

   2. Set the Dip angle and Dip direction (for planar type) or Plunge and Trend (for linear type).

      Tip

      • For planar type, create a discontinuity object of the whole slope face with the dip and strike Query tool, then drag the discontinuity object into the dip fields of the Stereonet Contours panel.

      • For linear type, create a discontinuity object of the linear feature, then drag the object into the plunge and trend fields of the Stereonet Contours panel.

   3. Set the Minimum angle as the lowest angle between the measurement orientation and the discontinuity that may be used for weighting.

6. Click OK or Apply.

The rose diagram components are saved in a custom container inside the geotechnical container.