How to determine the extent of plane features?

To determine extent of plane structures individually, select a plane feature by using the yellow 3D cursor in 3D View and press the Enter key to snap close to the feature. The plane feature will change to a purple outline when a successful snap has been performed. Press ‘i’ to bring up its information:

In the above example, a specific Joint plane feature has been snapped and its information displayed in the Plane Feature Info dialog. The extent of this plane feature can be described by the Max. Chord Length; this is the longest distance between any two digitised points used to define it. It’s the maximum “width” in any direction essentially, which makes it a sensible measure of persistence. By default, the extent of the plane feature is also represented by the diameter of the halo (the circular disc of best fit), although the Halo Diameter can be changed at any time by the user (without affecting the Max. Chord Length).

The plane feature information for all planes captured can be saved to a .csv file by selecting from the menus: Feature Info | Feature Info List

Press the Save to File button and select .CSV for Save as Type to export the Dip and Dip Direction information. This .csv file can then be opened in Microsoft Excel and will contain all the planes’ information.