DBPapers
DOI: 10.5593/SGEM2014/B23/S10.051

VISUALIZATION OF TRACKS USING DIGITAL TERRAIN MODEL AND IMAGE PROCESSING METHODS

M. Faltynova, E. Matouskova, Z. Svec
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-12-4 / ISSN 1314-2704, June 19-25, 2014, Book 2, Vol. 3, 405-410 pp

ABSTRACT
This article describes visualization and image processing methods that can be applied on digital terrain models (DTM) to highlight objects hidden in the landscape. This can help archaeologists understand the landscape evolution including the differentiation between natural processes and human interventions. Different visualization methods were applied on a system of parallel tracks hidden in a forest and its surroundings – part of old route called “Devil’s Furrow” near the town of Sázava. The data from the airborne laser scanning acquired by the Czech Office for Surveying, Mapping and Cadastre was used. The average density of the point cloud was approximately 1 point/m2. The goal of the project was to visualize the utmost smallest terrain discontinuities, e.g. tracks and erosion furrows, which some were not wholly preserved. Generally we were interested in objects that are clearly not visible in DTMs displayed in the form of shaded relief. Some of the typical visualization methods were tested (shaded relief, aspect and slope image). To get better results we applied image-processing methods that were successfully used on aerial photographs in the past. This article summarizes the results of testing on a selected area.

Keywords: archaeology, ALS, DTM, slope image, image filtering