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East of Regensburg (southern Germany), the township of Donaustauf is situated. The small city is dominated by the ruins of the castle Donaustauf. The castle sits on a hilltop, approximately 100m above the Danube. It is the oldest castle mentioned in documents within the area of Regensburg. Between 914 and 930, several records can be found that mention a castle which is called Stauff (castellum quod dicitur Stuffo). It is assumed that the castle was erected by Bishop Tuto of Regensburg (893–930), as a defence against the Hungarian invasion. However, archaeological excavations revealed that at least the North-Eastern part of the hilltop was fortified about 500 B.C. already. Since the 10th century, the castle has had an eventful history: Just between 1132 and 1161 it was seized four times. Finally, the Donaustauf castle was sieged and conquered by Swedish troops in 1634. They destroyed the castle over several days of artillery fire, and explosions. After that, repairs were done but since 1648 it has been abandoned and used as a quarry. A cemetery is located within the outer castle walls, which is still in use today. Over the centuries, sector fortifications have been built to protect the castle. In other words, the hill on which the castle stands was fortified from top to bottom and this fortification was adapted to the different needs of the time. The oldest part dates back to the 11th century, the last strengthening was carried out in 1620. To protect the central part of the castle, six gates were built. Only four of them are visible today. The most impressive gate is the most inner gate to the bailey castle. The entrance is covered by two groin vaults that are separated by a wide arch. In the first floor of the building even today the castle chapel is still visible.
The structure of the castle ruins, which requires the use of several acquisition techniques, as well as its historical importance make the site an ideal site for training. Due to that Donaustauf castle has been chosen as the 2nd ITN-DCH case study. A previous data set of the castle recorded by ArcTron3D is available. This set contains aerial and terrestrial data acquired by photogrammetric and laser scanner techniques. This dataset can be used within this project as a state of the art dataset and compare it to the newly gathered data.
Within the ITN-DCH a first model of the castle and its landscape was generated using aerial images acquired with an ultra-light paraglide trike. During June 2015th an extensive acquisition campaign was carried out. A big data set was created using laser scanner and photogrammetric techniques. Also, different remains of the castle which actually are located in the Historische Museum of Regensburg were geometrically documented.
The next step is the generation of a complete 3D model of the castle and its landscape. The integration of the different techniques is a challenge. The airborne technology will be used to create the model of the hilltop the hilltop of the castle, the Danube, the town and part of the backcountry. Photogrammetric and scanner data will allow to create a model of the internal structure as well as to create high resolution 3D models of the most relevant elements.
The main goal is a complete documentation of the site. As well as the geometrical documentation of the site, the different intangible documentation provided by historical documents will be integrated. A virtual reconstruction of the chapel, which is one of the most important part of the castle will also be done. Finally, a dissemination platform will be created in order to make all the information available.
Codreanu-Windauer, S., Gieß, H., Schnieringer, K. (2009): Die Burg Donaustauf Neue Erkenntnisse zur Baugeschichte, Regensburger Land/2, pp. 63 – 76
Hage, H., (2009): 375 Jahre Zerstörung der Burg und Verwüstung des Marktes Donaustauf im Dreißigjährigen Krieg, Burgpfeifer, p.3.
Boos, A. (1998): Burgen im Süden der Oberpfalz Die früh- und hochmittelalterlichen Befestigungsanlagen des Regensburger Umlandes. ISBN 978-3930480036.