Converts oriented core angles (sometimes known as "alpha", "beta" measurements) from "Relative to Hole" to "Absolute" (or real-world) measurements, so that they can be viewed in 3D scenes.
Structural measurements of drill core can be recorded using various conventions, usually either Absolute, or Relative to the hole orientation. Absolute measurements are reported using real-world compass orientations, usually either as Dip & Azimuth, Dip & Dip Direction, or sometimes as Dip & Strike. (Note that Azimuth and Dip Direction are the same direction, but just using different terms.) Measurements that are "Relative to hole" are also sometimes called Alpha and Beta angles. These measurements are recorded "relative to the drill hole" and are not oriented in true compass locations. These values can be converted to absolute values using this tool.
After converting relative core angle measurements into absolute values, the Modify Symbology tool can be used to plot oriented disc symbols in 3D scenes to view the structural data.
| Parameter | Explanation | Data Type |
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Point Feature Class |
The input point feature class that contains alpha and beta measurement values that need to be converted to real-world angles. |
Point feature class |
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Alpha field |
The Alpha field is the dip measured relative to the hole axis, with zero degrees parallel to the hole axis, and 90 degrees being perpendicular to the hole axis. |
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Beta field |
The Beta field is the direction measured clockwise looking down the hole axis, from either the top or bottom of the hole as the reference point. |
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Dip field |
An output calculated field. Dip is measured downward from horizontal (e.g. 90 degrees is vertical). |
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Dip direction field |
An output calculated field. Dip direction is the azimuth, from North, of the direction of maximum dip (e.g. 90 is East, 180 is South). |
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Core reference for beta |
Absolute measurements are taken with reference to either the top, or bottom of the drillhole. Select the appropriate reference to ensure calculations are correct. |
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