Festung Kufstein

The fortress of Kufstein (“Festung Kufstein”) is a jewel in the lower region of Tyrol, Austria and a landmark of the district capital of Kufstein. The fortress, owned by the bishops of Regensburg, was documented for the first time in 1205. Afterwards the ownership was shared with the Bavarian Dukes. From 1313 onwards Kufstein Castle belonged to the Dukes of Bavaria. In 1415 Duke Ludwig "the Bearded" enlarged the fortification. In 1504 Emperor Maximilian I besieged and conquered Kufstein. He then ordered the castle to be newly built and expanded it to the size of a fortress. Once again in the 17th century the complex was enlarged. In 1703 and 1805 the Bavarians conquered the fortress which again came into Austrian ownership in 1814. It has belonged to the city of Kufstein since 1924.

Some years ago it seemed necessary for further maintenance of the medieval fortress to start a serious renovation of the whole complex of the various buildings. To record and document the situation before and maybe compare it to the status after the renovation a photogrammetric recording was initiated. On the one hand photos have been taken using a helicopter and a metric camera Zeiss UMK to record the outer part of the monument and the rocky hill on which it is based. On the other hand a modern digital camera Olympus E 10 with over 4 Million Pixel resolution was calibrated and used to record the interior and hidden parts.

Over 350 photos of different origin have been used to set up the 3D model of the medieval fortress and to create a virtual reality building.

Beside the primary task to make a documentation of the as is status of the buildings a second goal had to be taken into account. The fortress is planned to be used as an arena for cultural events such as operas, musicals and other performances where the model can be used to plan the seating for the audience and the lights and scenery for the stage.

Over 200.000 single points have been measured and calculated to give a detailed 3D representation of this very complex landmark. It now can be used for interactive navigation in the Website of the fortress as well as a stand alone project for tourists within the fortress area. So not only it is possible to visit the site using the internet but also to give older and handicapped people the opportunity to walk around the fortress without having any problems

To give an idea about the regional situation also the rock on which the fortress is situated and its network of paths has been reconstructed with close range photogrammetric means

The overall photogrammetric restitution took 4 years until now and included analytical methods (analytical plotter) as well as digital ones (low cost photogrammetric tools). The combination of and comparison between can be very well shown in this large project.


luftbild  Klick to see samples of these photos.


The photomodel is also the data storage concept. Further results can be derived from this model, e.g. by parallel or perspective mapping to an arbitrary viewing plane.


Fly overs and walk throughs show the detailed reconstruction and the usefulness of 3D representation and modelling of monuments and sites of cultural heritage

These fly-arounds can be derived easily.