The Use of Direct Georeferencing in Aerial Photogrammetry with Micro UAV

Abstract

This paper deals with the practical use of the direct georeferencing technique which has applying in the area of aerial photogrammetry and digital surface model (DSM) creation. Todays micro unmanned aerial vehicles (UAVs) are able to carry high resolution camera, global navigation satellite system (GNSS) receiver with up to 1 centimeter position accuracy and inertial measurement unit (IMU) based on MEMS technology. These sensors are fundamental for the direct georeferencing. Some types of micro UAVs platforms and aerial mapping methods are descibed at the begening. Special attention is paid to geometric method called triangulation witch forms the basis of the technique. Practical photogrammetric measurement with simulated aerial photographic data is described in the second part of the paper. For this purposes low- cost commercial camera as a image sensor and high-accurate real time kinematic (RTK) GNSS receiver as a positon sensor was used.