id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
geoplanning-25894	Ajayi, Oluibukun Gbenga; Palmer, Mark	Modelling 3D Topography by Comparing Airborne Lidar Data with Unmanned Aerial System (UAS) Photogrammetry Under Multiple Imaging Conditions	2020	17	.pdf	application/pdf	7703	439	54	The accuracy of the DEM generated from 1m resolution and 2m resolution LiDAR data together with the accuracy of the DEM generated from the UAV images acquired at different altitudes, are analyzed using the 1 m LiDAR DEM as reference for the accuracy assessment. These results further affirm the findings of the horizontal and vertical accuracies, which affirms that the 2 m LiDAR DEM is more planimetrically accurate when compared to the UAV based DEM but the UAV based DEMs are more accurate than the 2 m LiDAR DEM in terms of vertical or altimetric coordinates which implies that UAV based DEM is more reliable than LiDAR data of 2 m resolution for 3D topographic modeling.	cache/geoplanning-25894.pdf	txt/geoplanning-25894.txt