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The establishing of historical monuments database in the Czech republic
This way we can add other XML tags and attributes needed for description of the projects. The value of the attribute "id" in the tag "camera" can be used as a link elsewhere as in the tag image in the previous example. It is clear that the information must contain spatial localisation such as coordinates, district, town etc. We can summarize the basic idea of our approach as follows. First of all we are going to collect and classify them using XML tags as we have tried to explain in the previous example. WWW pages are going to be generated by software from primary XML data (as well as database records needed for search operations). The most important advantage of the present project stage of the is that technical questions and programming can be postponed and solved later. Should the need of restructuring of the XML description of our project arise in future, it would be easy to convert the gathered data into a new format because of clear XML syntax. The same holds for the HTML presentation, which we are not solving now. The necessity of basic change of XML format, we believe, is unlikely (adding definitions of new XML tags is not a problem). We have gained practical experience with XML as a data description language in the filed of geodetic network adjustment in last two years.
Photogrammetry
The Laboratory of Photogrammetry at the Czech Technical University in Prague is the largest university photogrammetric centre in the Czech Republic. It is placed at the Faculty of Civil Engineering and it works in a cooperation with the Laboratory of Quantitative Methods of Monuments Research. The Laboratory of Photogrammetry is traditionally joined to the department of Mapping and Cartography similarly as the Laboratory of Remote Sensing. On the area of 200 m2 a set of photogrammetric equipment is located for about 80 students and 5 Ph.D. students. The equipment of the Laboratory of Photogrammetry involves a set of photogrammetric cameras UMK 6.5,10,20,30, SMK 5,5 for terrestrial photogrammetry and digital cameras Olympus 2000C and Olympus 2500. For digital image sequence (*.mpg) a CCD Video Camera Sony is used. The laboratory is equipped for digital stereo photogrammetry (small digital stations with stereoscope equipment - DVP Leica and VSD Krakow, professional stations with Crystal Eyes hardware stereo equipment Intergraph ImageStation - Unix and ImageStation SSK and the Czech-made photogrammetric workstation PhoTopol). For processing in some projects, precision stereocomparators and a lot of PC connected analogue plotters are still used. The Laboratory of Photogrammetry at the Faculty of Civil Engineering cooperates with the Laboratory of Quantitative Methods in Monuments Research on Faculty of Nuclear Physical and Physical Engineering. This laboratory is equipped for physical methods - namely thermoluminescence dating, X-ray fluorescence analysis and photogrammetry (RolleiMetric 6006, 40 and 80mm, CDW and MSR software for digital single and multiphoto processing). The major work of the Photogrammetric laboratory is the 3D measurement and documentation of historic buildings and monuments by terrestrial photogrammetry. This work is very interesting for architectural historians and experts from the State Institute of Care of Historic Monuments. Therefore the possibilities of the laboratory are very good and its future activity secured for a long time. Some projects are financed by grant agencies.
Projects
In the Czech Republic, there are lots of monuments of various architectonic styles. The Laboratory of Photogrammetry and Lab. of Quantitative Methods tackle in this time typically 4-6 projects per year. This number is not sufficient. For a good database filling, more than 100 projects per year will be good. This can be realised only with help of students and by using of simple digital photogrammetry. In this case, a simple technology for object documentation (3x3 rules for Simple Photogrammetric Documentation of Architecture, Waldhäusl, Ogleby ) is used.
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