The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Publications Copernicus
Articles | Volume XL-1/W2
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-1/W2, 195–200, 2013
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-1/W2, 195–200, 2013

  16 Aug 2013

16 Aug 2013


K. Haubeck1 and T. Prinz2 K. Haubeck and T. Prinz
  • 1Institute of Geography, Westfalian Wilhelms-University Münster, Germany
  • 2Institute for Geoinformatics, Westfalian Wilhelms-University Münster, Germany

Keywords: Archaeology, Application, DEM/DTM, Orthoimage, Close Range, UAV, Stereoscopic

Abstract. The use of Unmanned Aerial Vehicles (UAVs) for surveying archaeological sites is becoming more and more common due to their advantages in rapidity of data acquisition, cost-efficiency and flexibility. One possible usage is the documentation and visualization of historic geo-structures and -objects using UAV-attached digital small frame cameras. These monoscopic cameras offer the possibility to obtain close-range aerial photographs, but – under the condition that an accurate nadir-waypoint flight is not possible due to choppy or windy weather conditions – at the same time implicate the problem that two single aerial images not always meet the required overlap to use them for 3D photogrammetric purposes. In this paper, we present an attempt to replace the monoscopic camera with a calibrated low-cost stereo camera that takes two pictures from a slightly different angle at the same time. Our results show that such a geometrically predefined stereo image pair can be used for photogrammetric purposes e.g. the creation of digital terrain models (DTMs) and orthophotos or the 3D extraction of single geo-objects. Because of the limited geometric photobase of the applied stereo camera and the resulting base-height ratio the accuracy of the DTM however directly depends on the UAV flight altitude.