How can I measure the angle between a line and plane in Dips?

There is no option for directly measuring the angle between a line and a plane in Dips.  However, you can do this using various workarounds.  This example will consider a lineation (line) of 110/50 and a foliation (plane) of 175/50.

  1. Use the Add Plane option to add a plane to the stereonet with dip/dip direction = 50/175.
  2. Switch the coordinate convention to trend/plunge.
  3. Use the Add Plane option to add the lineation with trend/plunge = 110/50.
  4. Add a Pitch Grid plane which passes through the foliation pole, and the lineation point. 
  5. Use Measure Angle to measure the angle between the lineation point and the intersection of the foliation plane (great circle) and the pitch grid plane.
  6. The angle should be approximately 17 degrees.

 

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Measuring the angle between a line and a plane