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Repository of videos for image velocimetry: Towards harmonization of image velocimetry techniques for river surface velocity observations
18 August 2020
On the Use of Unmanned Aerial Systems for Environmental Monitoring
21 August 2020

Assessing the Accuracy of Digital Surface Models Derived from Optical Imagery Acquired with Unmanned Aerial Systems

Some useful recommendations for UAS-surveys aimed at the derivation of 3D surface models can be found in our recent manuscript published on Drones MDPI.

The results highlight that optimization of both the choice and combination of flight plans can reduce the relative error of the 3D model to within two meters without the need to include GCPs. However, the use of GCPs greatly improved the quality of the topographic survey, reducing error to the order of a few centimeters. The combined use of images extracted from two flights, one with a camera mounted at nadir and the second with a 20° angle, was found to be beneficial for increasing the overall accuracy of the 3D model and especially the vertical precision. 

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# File Description Date added Added by File size Downloads
1 pdf Assessing the Accuracy of Digital Surface Models Derived from Optical Imagery Acquired with Unmanned Aerial Systems 31 January 2019 8:52 Salvatore Manfreda 3 MB 466
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