Drone Photogrammetric Accuracy Change With Flying Height


Abstract
A perception among photogrammetrists is that as the flying height increases, accuracy decreases as well. To investigate this intuition, two separate flights are flown. For the first flight, the UAV data are collected at 60, 90 and 120 m. For the second flight the data are collected at 54, 73 and 121 m. To analyze the data sets, Trimble Inpho and Pix4D are used. For the results, standard deviations and Root Mean Square Error (RMSE) values are compared. Results showed that Pix4D had consistently lower and almost constant RMSE and standard deviation values across flights, while Inpho's RMSE and standard deviation increased linearly with height in Project A and non-linearly in Project B. The observed variations between the software remain unclear, and limited Pix4D documentation hinders result interpretation, indicating a need for further research.
Keywords:
Photogrammetry, UAV, Trimble Inpho, Pix4D, AerotriangulationDownloads
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