DBPapers
DOI: 10.5593/sgem2017/23/S10.040

USE OF GEOMATIC METHODS FOR FINDING AND DOCUMENTING HISTORICAL ARTILLERY REDOUBTS

E. Housarova, J.Sedina, K. Pavelka
Monday 11 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7408-03-4 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 23, 323-330 pp, DOI: 10.5593/sgem2017/23/S10.040

ABSTRACT

There are a lot of traces of wars or military activities throughout the Czech Republic. You can find fortifications from Roman times to the Cold War. In 2009, a big project started in the Czech Republic – aerial laser scanning of the whole national territory. It was finished in 2013; since this year there has been a possibility to use very precise digital terrain models (DTM), a new face of the landscape mainly in forested areas, derived from aerial laser scanners and INS instruments. For archaeology, the use of DTMs in shaded relief forms can be a tool for the investigation of landscapes to find relics from the past. After a quick overview of data in shaded relief forms, which is often used in archaeology with special lighting (a very low light position from the northwest, which gives long shades even to small humps), many new objects have been found or detected better than previously attempted. In the western part of the Czech Republic, we focused on finding potential historical artillery redoubts from the 17th century based on the Swedish invasion of our territory. Some known fortifications were detected and verified by terrestrial measurements of written sources, and, in some cases, new structures were identified. We focused on the investigation of a potential newly discovered artillery redoubt near the village of Černošín, which can be a light imperial fortification from the end of the Thirty Years’ War (a battle at Třebel in 1647 took place near this area). This object consists of a ditch and a rampart, square in shape, ca 15×15 m, on a small hill near a ravine where a road has been preserved to the present day. The site has recently been deforested, which gives us a possibility of acquiring documentation; we used the Phantom Dji 4 multicopter for creating precise orthophotos, and a partial DSM (digital surface model) and a laser scanner for terrestrial measurement. The GEM GSM 19 Gradiometer/Magnetometer (Overhauser) was simultaneously used. As a result of magnetometric measurement, a digital model of this object was made, which is useful for archaeological and historical analysis.

Keywords: RPAS, DTM, orthophoto, magnetometer, archaeology