Intersect

Display Drillhole Intersection Points

Use the Intersect option to display and highlight the points at which a drillhole intersects a triangulation or specified elevation. This allows you to plot intersections of drilling with underground openings.

The intersections are stored as points with each point being considered an object. With each point/object, the following information is stored:

• Object and point name
  This is the name of the drillhole from which it came.

• Object value
  This is the downhole depth from the collar to where the hole intersects the triangulation or specified elevation. The Analyse > Label > Object Label option can also be used to label the intersection points.

Note:   If a drillhole intersects with a triangulation on multiple occasions, then each point will be stored under the same name, but with different values reflecting the different downhole depths.

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Instructions

On the Geology menu, point to Drilling, and then click Intersect to display the Layer for intersection points panel.

Layer name

Enter the name of the layer that will be used to store the intersections.

Description

Enter a description to further describe the contents of this layer. The description can be up to 80 alphanumeric characters and may include spaces. If a description is not entered, then a default description will be used instead. If the chosen layer already has an assigned description, the description displays when the layer is selected. Existing layer descriptions can be overwritten.

By Triangulation picking off screen

Select this option to pick the required triangulation directly from the screen. If there is only one triangulation loaded onscreen, then it will be selected automatically.

By Triangulation selecting from list

Select this option to pick the required triangulation from a list. The triangulation will be selected through the standard Open panel, which displays after you have completed the Layer for intersection points panel. The Open panel will allow you to browse through your available data directories and supports the use of wildcards (* for multiple characters, % for a single character) to limit the items displayed with the list.

By Elevation

Select this option to nominate a horizontal plane instead of a triangulation to intersect with the drillholes.

Click OK.

Figure 1 : Drillholes Intersecting a Triangulation

Tip:   For a clearer view of the intersection points, remove the drillholes from the screen using the Remove Drillholes option.