https://www.opengis.net/def/crs/OGC/0/Engineering3D Engineering CRS (3D) with an unknown origin and a Cartesian CS A coordinate reference system used to describe spatial location over small areas of the Earth using a flat-Earth approximation of the Earth’s surface: corrections for Earth-curvature are not applied. Typical applications are for civil engineering construction and building information management. The origin of the datum is unknown. cartesian-local-3d Cartesian 3D CS (right-handed). Axes: x,y,z. Orientations: unspecified, unspecified, up. UoM: m. The location of the origin is unspecified. The direction of the first two axes is unspecified except that the three axes form a right-handed CRS. For use in engineering coordinate reference systems. x-local For use in engineering coordinate reference systems. x unspecified y-local For use in engineering coordinate reference systems. y unspecified z-local For use in engineering coordinate reference systems. z up engineering-unknown-origin Engineering Datum with an unknown origin For use in unspecified engineering coordinate reference systems.