About the Bearing Distance Resection Helper Online Free Tool

The Bearing Distance Resection Helper Online Free Tool estimates an unknown point from bearings observed toward two known control points.

How to Use the Bearing Distance Resection Helper Online

1. Enter X/Y coordinates for two known control points.
2. Enter bearings from the unknown point to each control point.
3. Run the helper to estimate the unknown point and distances to each control point.

Choosing Options Correctly

Bearings should use the same grid or true-north reference as the coordinate system. Nearly parallel bearings make the intersection unstable, and redundant observations should be adjusted with survey software.

Common Use Cases

• Estimate a field point from two observed bearings.
• Check a resection setup before detailed adjustment.
• Teach bearing intersection geometry.

Quick FAQ

Does this use distances as observations?
No. Distances are computed after the bearing intersection.

What happens with parallel bearings?
The tool reports an unstable resection because the intersection is poorly defined.

How many known points are needed?
Two bearing observations can form an intersection, but more control and redundancy are better for survey reliability.

What controls the accuracy?
Bearing precision, known point coordinates, geometry between rays, and consistent units all affect the computed position.