Altitude Netherlands - country - DTM (INSPIRE Harmonised)

Height - country - DTM is the ground level of the Netherlands that has been harmonized for the international combination of altitude records. The source is the most recent collection of AHN. The grid files have a resolution of about 1 meter. It contains detailed and precise height data determined with a minimum of 10 height measurements per square meter. The height is measured with laser altimetry: A technique in which an aircraft scans the earth's surface with a laser beam. From the measured heights (points) grids are made.