Lotniczy skaning laserowy (LiDAR-ALS) jako źródło danych do obliczeń stateczności skarp na terenach zadrzewionych i zakrzewionych

Abstract

Airborne laser scanning (LiDAR-ALS) as a source of data for calculations of escarpment stability in wooded and bushy areas.A b s t r a c t. The paper discusses the problem of quick acquire height data for calculation of escarpment stability. In past the slope of profile was obtained from classical land survey methods (like Total Station, GNSS, etc.), cartometric measurement on maps or measurements based on a Digital Terrain Model from aerial photography. Now we have a new method that is Airborne Laser Scanning (LiDAR-ALS). In 2011–2014 almost all country was measured in this method. The declared accuracy of height measurement on the durable surfaces is about 0.10–0.15 m. Author compared this method with classical method Global Navigation Satellite System – Real Time Network (GNSS-RTN) on two wooded and bushy areas. The comparison was based on the measurement characteristic points on the profiles and acquisition of height data from LiDAR-ALS data. Data in this method were obtained in two ways: from point cloud and from DTM created from this point cloud. In the next step, height differences were calculated and these data were subjected to basic statistical calculations. The result of the study was a mean error of height data from LiDAR-ALS and conclusions about its usefulness in acquire height data for calculation of escarpment stability.