Leaf: Elevation Dataset: Danmarks Højdemodel (DHM)
DHM provides Denmark’s national elevation data from airborne LiDAR.
Spatial Access Path
DHM products are raster/point cloud — no entity joins.
Access is by spatial query: give coordinates, get elevation.
DTM (Terrænmodel): bare-earth elevation (0.4m grid)
└─ Use: hydrology, flood modelling, slope analysis
DSM (Overflademodel): including buildings, vegetation (0.4m grid)
└─ Use: visibility analysis, urban modelling, solar potential
Point cloud: raw LiDAR returns (~4-5 pts/m²)
└─ Use: custom processing, building extraction, forestry
Contour lines: derived from DTM (0.5m and 2.5m intervals)
└─ Use: cartographic display, terrain visualisation
Origin and quality layers: provenance and acquisition context for the DHM products
└─ Use: quality control, lineage, and interpreting model generation
Historical releases and hillshades: archived DHM vintages and derived terrain visualisations
└─ Use: temporal comparison, visual interpretation, and archaeological or landscape reading
Key Attributes
| Attribute | Description |
|---|---|
elevation_value | Height in metres above DVR90 datum |
horizontal_accuracy | ~0.15m |
vertical_accuracy | ~0.05m (terrain), ~0.10m (surface) |
acquisition_date | LiDAR campaign date |