ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-5/W1, 313-318, 2013
https://doi.org/10.5194/isprsannals-II-5-W1-313-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
31 Jul 2013
POSITIONING IN TIME AND SPACE – COST-EFFECTIVE EXTERIOR ORIENTATION FOR AIRBORNE ARCHAEOLOGICAL PHOTOGRAPHS
G. Verhoeven2,1, M. Wieser3, C. Briese3,2, and M. Doneus2,1 1VIAS, Vienna Institute for Archaeological Science, University of Vienna, Franz-Klein-Gasse 1, 1190 Vienna, Austria
2LBI for Archaeological Prospection and Virtual Archaeology, Franz-Klein-Gasse 1, 1190 Vienna, Austria
3Department of Geodesy and Geoinformation, Vienna University of Technology, Gusshausstrasse 27–29, 1040 Wien, Austria
Keywords: Aerial image, Archaeology, Direct georeferencing, Exterior orientation, Geocoding, GNSS/INS Abstract. Since manned, airborne aerial reconnaissance for archaeological purposes is often characterised by more-or-less random photographing of archaeological features on the Earth, the exact position and orientation of the camera during image acquisition becomes very important in an effective inventorying and interpretation workflow of these aerial photographs. Although the positioning is generally achieved by simultaneously logging the flight path or directly recording the camera's position with a GNSS receiver, this approach does not allow to record the necessary roll, pitch and yaw angles of the camera. The latter are essential elements for the complete exterior orientation of the camera, which allows – together with the inner orientation of the camera – to accurately define the portion of the Earth recorded in the photograph. This paper proposes a cost-effective, accurate and precise GNSS/IMU solution (image position: 2.5 m and orientation: 2°, both at 1σ) to record all essential exterior orientation parameters for the direct georeferencing of the images. After the introduction of the utilised hardware, this paper presents the developed software that allows recording and estimating these parameters. Furthermore, this direct georeferencing information can be embedded into the image's metadata. Subsequently, the first results of the estimation of the mounting calibration (i.e. the misalignment between the camera and GNSS/IMU coordinate frame) are provided. Furthermore, a comparison with a dedicated commercial photographic GNSS/IMU solution will prove the superiority of the introduced solution. Finally, an outlook on future tests and improvements finalises this article.
Conference paper (PDF, 1309 KB)


Citation: Verhoeven, G., Wieser, M., Briese, C., and Doneus, M.: POSITIONING IN TIME AND SPACE – COST-EFFECTIVE EXTERIOR ORIENTATION FOR AIRBORNE ARCHAEOLOGICAL PHOTOGRAPHS, ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-5/W1, 313-318, https://doi.org/10.5194/isprsannals-II-5-W1-313-2013, 2013.

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