Resection Calculator
Determine the coordinates of an unknown point by measuring angles from known reference points
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Resection Results
Frequently Asked Questions
Resection is a method for determining an unknown position (point P) by measuring angles to at least three known points. It’s commonly used in surveying when you need to establish your position based on visible landmarks or control points.
You need a minimum of three known points to perform a resection calculation. However, using more points can improve accuracy and provide redundancy to check your results.
This calculator works with any consistent coordinate system. You can use local grid coordinates, state plane coordinates, or UTM coordinates as long as all points use the same system.
Errors can occur if your known points are colinear (in a straight line) or if your angle measurements are inconsistent. Double-check your input values and ensure your known points form a good geometric configuration.
Yes, but you’ll need to convert latitude/longitude to a projected coordinate system (like UTM) first, as angular calculations require Cartesian coordinates.