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A Simple Formula To Calculate Azimuth Without A Two-Argument Arctangent Function, Thomas H. Meyer, Jacob Conshick
A Simple Formula To Calculate Azimuth Without A Two-Argument Arctangent Function, Thomas H. Meyer, Jacob Conshick
Department of Natural Resources and the Environment Articles
Calculating azimuths from planimetric coordinates is complicated when the available implementations of inverse trigonometric functions have ranges spanning only 180° instead of 360° as azimuth requires. A tangent half-angle formula is used to derive a formula with only one special case (due South) that computes azimuth for the whole circle.