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D. Arc-Based Intersections
1. Circle; Arc
Figure D-1 is a diagram of a circle and Equation D-1 is its equation in terms of North and East coordinates.
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| Figure D-1 Circle |
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Equation D-1 | |
| where: | ||
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O |
radius point point on circumference radius |
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An arc is a portion of a circle, Figure D-2.
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Figure D-2 |
Generally we only need an arc long enough to meet an intersection condition. We'll cover other specific arc geometry in the Curvilinear Traverse chapter.