Function map_coords 

pub fn map_coords<G, Q, F>(geometry: &G, map: F) -> G::Output
where
    G: MapCoords<Q>,
    Q: PointTrait,
    F: FnMut(&G::Point) -> Q,

Map every point in a stock geometry into a newly constructed geometry.

The point closure may change the scalar or coordinate-system type while the geometry’s topology and ring parameters are preserved.