Current Height file Netherlands (AHN) WCS

The Current Height File Netherlands (AHN) is the digital height map for the whole of the Netherlands. It contains detailed and precise height data with a minimum of 10 height measurements per square meter. Ahn is a collaboration of the provinces, government and water boards. The height is measured with laser altimetry: a technique in which a plane with a laser beam scans the Earth’s surface. The current AHN is version 4. This version was obtained for the years 2020, 2021 and 2022.For more information on the AHN see https://ahn.nl.

These WCS contain the AHN grid files with a resolution of 0.5 meters. A distinction was made between the DTM and the DSM. The DTM is intended as a ground level file, where all points classified as “moving ground” have been re-sampled to a grid based on a Squared IDW method. The DSM is intended as a raw stock, where all points except those classified as “water” have been re-sampled into a grid based on a Squared IDW method.