Transforms coordinates from "heights above the ellipsoid" to "heights above the geoid". This module provides the algorithms from an Earth Gravitational Model as a MathTransform implementation. Installing the JAR on the classpath should be sufficient for making vertical transformations available to an application like any other transforms.
Homepage POM file JAR file Javadoc'org.geotoolkit:geotk-referencing3D:3.20-geoapi-3.0'