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Trend Line

The Trend Line Trend Line Icon option allows you to add a line through the center of stereonet or rosette plots. Adding a line to a plot is useful when comparing poles or concentrations on opposite sides of the stereonet. The line may also be used to show a dominant orientation such as the trend of a tunnel centerline or the strike of a vertical wall.

To use the Trend Line option:

  1. Select Trend Line Trend Line Icon from the toolbar or the Tools menu.
  2. Move the cursor over the active view, and a line which follows the cursor will appear on the plot.
  3. The cursor coordinates are always visible in the status bar. When the line is at the desired orientation, click the LEFT mouse button.
  4. A dialog will appear, showing the Trend of the point at which you clicked the mouse.
  5. If this is the correct orientation of the line that you wish to add, then click OK to add the line to the plot.
  6. If this orientation is not correct, then enter the desired Trend and select OK.

After a Trend Line has been added, it can be moved, formatted, etc. See the Edit Tools Overview topic for details.

Right Click Options

The following options are available in the right-click menu while using the Trend Line option:

  • Pole Snap – this will "snap" the line to the pole nearest to the cursor location. Only applicable in Pole Vector Mode.

Line Properties

If you click on a Trend Line the following properties can be customized in the Sidebar.

  • Line Type – Trend Lines can be displayed in 3 different ways – Interior (full line terminating at the perimeter), Exterior (two collinear line segments plotted outside the perimeter), or Both (full line, extending past the perimeter)
  • Line Width – you can choose a line width between 1 and 10
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