Quantifying geomorphic change in Andean river valleys using UAV-PPK-SfM techniques: An example from the western Peruvian Andes

Assessment of Unmanned Aerial System Flight Plans for Data Acquisition from Erosional Terrain

“…This is a fully automated platform with an intuitive workflow that produces high-quality digital models from imagery [32]. The software uses the structure-from-motion approach [9,10,33]. It allows the processing of imagery acquired at different distances from the objects (from any position), capture angles, and focal lengths.…”

“…With the development of modern technologies and systems for data acquisition, such as unmanned aerial systems (UASs), the capabilities of generating high-precision models are increasing and they are being used more and more to study geomorphic processes [3][4][5][6]. These advances have been facilitated by the development of structure-from-motion (SfM) [7], a technique that combines well-established photogrammetric principles with modern computational methods [8][9][10]. Its use expands the possibilities of obtaining quality images from different angles and distances to the studied object, which allows the simultaneous processing of nadir and oblique photos [11].…”