Digital Surface Model (DOM1)
Description
The Digital Surface Model (DOM) is a follow-up product from the 3D measurement data. It describes the earth's surface and all non-temporary objects located on it by the spatial coordinates of a representative set of elevation points during the survey period. Height information is stored independently of scale and in accordance with data processing.
Based on the Airborne Laser Scanning (ALS) point clouds available throughout Lower Saxony since 2019, which have a geometric resolution of at least 4 points/m2, a high-precision DOM is provided in 1 x 1 km2 tiles. The grid width is 1m (DOM1) and the grid element position is in the center at 0.5 m positions (= pixel center). The height accuracy of the DOM1 is ≤ 30 cm for solid surfaces without vegetation. These were determined by a Delaunay triangulation from the classified ALS point cloud. The resulting Cloud-Optimized GeoTIFF (COG) is encoded in 32 bit with float values and was compressed using the LZW method. Empty pixels (NoData) contain the value -9999.
For more information, see the Downloads and Links tab.
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Tags
- advmis
- open-data
- höhenmodell
- opendata
- inspireidentifiziert
- gdimrh