Module org.opengis.geoapi
Package org.opengis.referencing.crs

Interface VerticalCRS

All Superinterfaces:
CoordinateReferenceSystem, IdentifiedObject, ReferenceSystem, SingleCRS
All Known Implementing Classes:
SimpleCRS.Vertical
@UML(identifier="SC_VerticalCRS", specification=ISO_19111) public interface VerticalCRS extends SingleCRS
A 1-dimensional coordinate reference system used for recording heights or depths. Vertical CRSs make use of the direction of gravity to define the concept of height or depth, but the relationship with gravity may not be straightforward.

By implication, ellipsoidal heights (h) cannot be captured in a vertical coordinate reference system. Ellipsoidal heights cannot exist independently, but only as inseparable part of a 3D coordinate tuple defined in a geographic 3D coordinate reference system.

Note: some applications may relax the above rule and accept ellipsoidal heights in some contexts. For example, as a transient state while parsing Well-Known Text 1, or any other format based on legacy specifications where ellipsoidal heights were allowed as an independent axis. However, implementers are encouraged to assemble the full 3D CRS as soon as they can.

This type of CRS can be used with coordinate systems of type VerticalCS.

Since:
1.0
See Also: