Έλεγχος ακρίβειας ψηφιακών μοντέλων επιφάνειας μέσω πολλαπλών πτήσεων UAV

Abstract

Given the rapid developments in photogrammetric software in conjunction with low cost and widespread use of autonomous unmanned aerial vehicles (AUAV), allowing fast, timely and accurate 3D modeling and mapping of small and medium sized areas. Bearing this in mind, the present thesis evaluates the accuracy of DSM models created using different flight patterns from a specific autonomous UAV in order to establish whether indeed AUAVs can be a reliable and economic solution for Digital Elevation Models extraction. The determination of the DSM accuracy of was done using ground control points. Three UAV flights, with 70% -65% in length and in width overlap, were incurred. The three flights patterns were West-East (H), North-South (V) and northwest to southeast (D). Were created and edited five blocks with different flight patterns and exported a raster DSM with 0,25m pixel size on the ground generated using multi-view stereo techniques (MVS). Finally using ground control points as reference points, the DSM accuracies calculated and compared to see which model offers the best results.