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    Intersection

 Angle-Angle Intersection
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 Angle-Angle Simulation
 Radiation

Radiation

A direction and a distance are measured from a known point to the feature to be mapped. The data can be plotted directly to scale, or can be reduced to coordinates using the formulae below where theta (q) is a bearing:

Diagram illustrating how to read the distance and direction of feature to be mapped using Radiation.

EP = EA + d sin q NP = NA + d cos q

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The Department of Geomatics
Maintained by:  Nicole Jones
Date Created:  October 1998