Global Mean Plane
The Global Mean Plane entity can be used to display the UNWEIGHTED or WEIGHTED Global Mean Plane and Pole Vector of ALL the data in a Dips file.
Use caution when using the global mean vector! When poles plot on opposite sides of the stereonet, a mean orientation calculated from the Lower Hemisphere or Upper Hemisphere alone will be incorrect. No vector correction is applied to poles on opposite sides of the stereonet, like in the case of Wrapped Sets, since the direction of "wrapping" is ambiguous when considering all poles.
Mean Plane Calculation
The calculation of mean planes in Dips is a vector mean. This is not equivalent to a simple numerical mean calculated by averaging Dip and Dip Direction values.
For example, say you have two readings of Dip Direction: 5 degrees and 355 degrees. The true (vector) mean is 0 degrees, whereas the numerical average is 180 degrees.
The Global Mean Vector is equivalent to including ALL of the poles in a single set, and calculating the vector mean (same calculation as for a Set).
Visibility
The Global Mean Plane always appears in the Visibility tree.
- To toggle on/off visibility of the Global Mean Plane, click on the Visibility
icon.
Properties
The following options are available in the Properties pane:
- Name
- Color
- Show Plane
- Show Pole
- Show Plane Label
- Show Pole Label
- Show Daylight Envelope
- Show Marker Ticks