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Rosette Plots Overview

A Rosette Plot is generated by selecting the Rosette Preset rosette preset icon option from the toolbar or the View menu.

The conventional Rosette Plot begins with a horizontal plane (represented by the equatorial (outer) circle of the stereonet). A radial histogram (with arc segments instead of bars) is overlain on this circle, indicating the density of planes intersecting this horizontal surface. The radial orientation limits (azimuth) of the arc segments correspond to the range of STRIKE of the plane or group of planes being represented by the segment. In other words, the rosette diagram is a radial histogram of strike density or frequency.

The Rosette Plot plots the strike of planes. It does not plot the Dip Direction of planes. The Rosette Plot does not differentiate between planes with left or right strike (i.e., planes with strike or strike + 180 degrees are counted in the same "bin" on the Rosette Plot, so the plot is always symmetric).

 Rosette Plot

  1. 3-D rock mass structure.
  2. Equivalent pole density stereonet (contour plot).
  3. Intersection of the joint planes with a horizontal section.
  4. Radial histogram or rosette of the strike of the joint planes.

The rosette (Figure 4) approximates the visual impression of the joint intersections with the horizontal plane (Figure 3).

NOTES:

  1. Dips has removed the requirement that the base plane of the rosette be horizontal. The plane can be oriented at any orientation in space – see the Sightline Normal to Rosette topic for details. The ROSETTE then represents the apparent orientation of the lines of intersection between the base plane of the ROSETTE and the planes in the data set.
  2. You will notice that each arc segment on a Rosette Plot has an equal and opposite counterpart (180 degrees apart). The Rosette Plot in Dips does NOT differentiate between LEFT and RIGHT handed strike and places planes with strikes 180 degrees apart in the same "bin" ( a "bin" = range defined by one arc segment). By default in Dips, each bin is 10 degrees wide. The bin size can be changed in the Rosette Options dialog.
  3. Dips does not display half circle Rosette Plots, only full circle plots.
  4. The reason you may not be seeing some data on the Rosette Plot is because, by default, the Rosette Plot is intended to display planes which are more likely to intersect the viewing plane (i.e., planes which are more perpendicular to the viewing plane, rather than parallel).
    • To change this setting, go to the Rosette Options dialog (you can right-click on the Rosette Plot) and change the minimum angle between plane and view face from 45 degrees (the default) to zero. This will display ALL of your planes of the Rosette Plot. For more information see the Angular Limits help topic.
    • By default the Rosette Plot only displays planes which intersect the viewing plane at an angle between 45 degrees and 90 degrees (perpendicular). This is because the Rosette is intended to simulate a visual impression of the intersection of planes with the viewing face.

Remember that the Rosette Plot in Dips is a representation of the STRIKE of the intersection of joint planes with the viewing planes. In the case of an arbitrary viewing plane, the Rosette displays the “apparent strike” of the plane intersections with the viewing plane (e.g., if the viewing plane is vertical then the rosette represents apparent strike). See the Rosette Applications help topic for more information.

Rosette Applications

Weighted Rosette Plot

Rosette Options

The Article on orientation of borehole data link in the Knowledge Base might also prove useful.

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