DTM is collected by laser scanning from aircraft (LiDAR). The elevation model is constantly updated, approx. 1/5 a year. Data contains information about when an area has flown. The point cloud has an average density of 4-5 points / m2 for data collected in 2014/15 and 8 points / m2 for data from 2018 onwards. The point cloud is classified and only points located on surface form the basis for this dataset. Buildings, vegetation and other objects have been removed from the model. The point cloud is converted into a grid with a size of 0.4 meters. Specifications: Horizontal 0.15 meters, Vertical 0.05 meters.
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