Dip and Dip-Direction Data

Use the dropdown list to select the channel that contains the dip data, in degrees. For "Absolute" Dip/Dip Reference, the dip is measured downward from horizontal (e.g. 90 degrees is vertical). For "Relative to hole", dip is measured with respect to the hole axis, with zero degrees parallel to the hole axis, and 90 degrees being perpendicular to the hole axis. This angle is also referred to as the "alpha" value.

Use the dropdown list to select the channel that contains the dip-direction data, in degrees. For "Absolute" Dip/Dip Reference, the dip direction is the azimuth angle, measured clockwise from North. For "Relative to hole", dip direction is measured clockwise looking down the hole axis, from either the top or bottom reference point. This angle is also referred to as the "beta" value. "Top" and "Bottom" can only be determined for non-vertical holes. In those cases where the hole is vertical, Dip and Dip-Direction is always interpreted using the "absolute" reference.

Dip/Dir Reference

Select to reference dip and dip-direction as absolute quantities. See the "Dip and Dip-Direction Data" section above for definitions.

Select to reference dip and dip-direction relative to the hole. See the "Dip and Dip-Direction Data" section above for definitions.

The Ref Line option is only available when the dip-direction reference is "Relative to hole". The reference line is a mark on the hole casing, located using gravity at either the "top" or "bottom" of the casing in a slanting (non-vertical) hole. For example, the bottom reference line is the mark, which would be created on the core casing using a plumb-bob with chalk if it were suspended from the central axis of the hole, if it were lowered down the hole. In practice this is down using a specially designed instrument.

Plot Parameters

Select this radio button and all symbols will be plotted with this colour; click the coloured box to select a particular colour.

Select this radio button to colour the individual symbols based on the value in the selected Structural Data channel. If a matching entry is found in the Structure codes file, the symbol will be plotted with the matching code’s colour. (Values not found in the codes file will not be plotted.)

Select the table and data containing the structure codes. This can be from-to or point (single-depth) data. Only those tadpoles which have a corresponding item at the same depth in the Structural Data channel will be plotted.

Enter the name of the structure codes file to use. This value is set by default to be the value entered in the Preferences.

Browse to select the structure codes file name. The entered name does not need to be an existing file, but in that case you must create the file using the Edit… button.

Bring up the Structure Codes edit dialog to modify or create the structure codes file.

Specify the length of the structural tick, in map sheet units (millimetres). For 3d plots this is the radius of the plotted disc.

Specify the structural tick thickness, in map sheet units (millimetres).

Check this option to fill the disc with a solid colour. If not checked, then the disc is plotted as an oriented circle centered about the hole axis at the appropriate depth, with a radius line showing the "down-dip" direction.

Depth Ticks

Check to enable/disable depth ticks. In contrast to the depth ticks defined in the Hole Traces tab, these depth ticks mark the boundaries of the From-To intervals of the data (actually the "From" and "To" locations themselves).

Select to plot depth ticks on the left side of the structural tick.

Select to plot depth ticks on the right side of the structural tick.

Specify the length of the depth ticks in map sheet units (millimeters). The ticks are plotted on the left side of the hole trace for "left" stereonet plots, or on the right side otherwise.

Specify the thickness of the depth ticks in map sheet units (millimeters).