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Technologies based on photogrammetric and remote sensing sensors represent the usual way for obtaining digital height and position data. This paper is dedicated to LiDAR data filtering for a DEM generation. The main purpose is presentation of a semi-automated method of filtering using mathematical and statistical algorithms for a valid data set. The method involves point cloud data filtering and interpolation. The principle of it is to validate an error free data set and construct the DSM from the last pulse refle...