Current Height file Netherlands 3 (AHN3) DTM

The Current Height File Netherlands (AHN) is the digital height map for the whole of the Netherlands. 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 AHN3 was collected in the period 2014-2019.For more information on the AHN see https://ahn.nl.

These WM(T)S services include the AHN raster 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.

荷兰现行高程文件（AHN）是覆盖全荷兰范围的数字高程地图。该数据集由荷兰各省、政府及水务局联合共建。其高程数据通过激光测高术获取：该技术依托搭载激光束的飞行器扫描地球表面。AHN3的采集周期为2014年至2019年。如需了解AHN的更多详情，请访问https://ahn.nl。

本次提供的WM(T)S服务包含分辨率为0.5米的AHN栅格文件，且区分了数字地形模型 (Digital Terrain Model) 与数字表面模型 (Digital Surface Model)。其中数字地形模型（DTM）为地面高程文件，所有被归类为“移动地面”的点位均基于平方反距离加权法重采样至规则网格。