Accuracy Assessment of Orthomosaics and Digital Terrain Models Generated By µVANT/DNPM
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Abstract
This present paper aims to demonstrate the evaluation of the accuracy of orthomosaics and Digital Terrain Models
(DTM) generated by the Unmanned Aerial Vehicle (UAV) developed by the University of Brasilia (UnB) in partnership
with the National Department of Mineral Production (DNPM). This study evaluated the orthomosaic and the MDT
from a pile of laminated limestone exploitation tailings in the Santana do Cariri municipality, state of Ceará, processed
in three diff erent situations: (1) without the use of ground control points; (2) using 4 ground control points, located in
buildings around the stack; and (3) using10 ground control points, pre-signaled on the surface of the tailing pile. The assessment of accuracy was performed from the trend analysis and accuracy of the models, and the results classifi ed
according to the Standard Cartographic Accuracy of Digital Cartographic Products (PEC-PCD). The results showed
that the evaluated products are precision and reliability compatible with those obtained by conventional aerial photogrammetry, if properly oriented by ground control points.
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