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📐 Geodesic Area & Parcel Calculator

📐 Geodesic Area & Parcel Calculator

Type or click out a boundary and get its true area on the curved Earth using the spherical-excess formula — the same maths GIS packages use — alongside the flat-map answer so you can see exactly how much error the curvature adds. Works for a garden, a farm, a drone survey or a whole US state.

Tip: click inside the plot to drop a new vertex.

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