Interior PointA point guaranteed to lie inside a geometry

JTS InteriorPoint algorithm ported to TypeScript and Rust

A faithful port of JTS

The algorithm is ported member for member into TypeScript and Rust, and the two are held to the same results, so a geometry gives the same point in either language.

The same command in both languages

Each package ships an interior-point command that reads WKT or GeoJSON from a file, a literal or stdin, and the two are held to byte-for-byte agreement on what they write.

Two utilities beyond the port

Alongside JTS's interiorPoint, the port offers verifyInteriorPoint, which checks a point against its geometry through an independent point-in-polygon locator, and centroidFirstInteriorPoint, which returns the centroid when it lies strictly inside.