Drillhole Symbols

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There are two types of drillhole overlay symbols; landmark symbols and structural symbols.

Landmark symbols have a fixed location and represent key positions that identify the direction of the drillhole and how it is positioned with respect to a 3D display section. Collar and end-of-hole positions, for example, are drillhole landmark positions. See Format Landmark Symbols.

Drillhole landmark positions
Structural symbol positions vary from hole to hole and depending on other parameters. These are used to identify the orientation (dip, dip direction, roll) of core samples. Orientation information is derived from object attributes. See Format Structural Symbols.

Drillhole overlay showing 3D structural symbols