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When ESRI tool "Calculate Grid Convergence Angle (Cartography)" is used to calculate line bearing or azimuth, is the bearing referenced to True North or Grid North?

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  • Thanks Mapperz. My question should have been when the bearing of a line is calculated using the "Add Geometry Attribute (LINE_BEARING)" tool, is the bearing referenced to Grid North or True North? Jul 3, 2020 at 13:42

1 Answer 1

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Existing field that will be populated with the true north calculation value in decimal degrees.

Note:

rotation_method (optional)

  • GEOGRAPHIC —Angle is calculated clockwise with 0 at top. This is the default.
  • ARITHMETIC —Angle is calculated counterclockwise with 0 at right.
  • GRAPHIC —Angle is calculated counterclockwise with 0 at top.

Source: https://desktop.arcgis.com/en/arcmap/latest/tools/cartography-toolbox/calculate-grid-convergence-angle.htm

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  • Thanks Mapperz. My question should have been when the bearing of a line is calculated using the "Add Geometry Attribute (LINE_BEARING)" tool, is the bearing referenced to Grid North or True North? Jul 3, 2020 at 13:34

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