Abstract
Recently, Unmanned Aerial Vehicle (UAV) has been applied popularly in generating DigitalSurface Model (DSM) and topographical map. However, there has been not muchresearch to improve accuracy of the generated map, especially when the terrainis covered by vegetation. This study proposed a solution to adjust the UAVderived DSM based on test points measured by GNSS-RTK to establishingtopographical digital maps. The result is a software that automaticallycorrects the height of the image measurement point on the surface of plantcover to the terrain elevation. Experimental results have proved the accuracyof the algorithm, the research content can be applied to actual production,achieving economic efficiency
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