Scholarly record

SURVEYING OF SACRED BUILDINGS AND CREATION OF THEIR DOCUMENTATION WITH AUTOMATED SUPPORT

Dalibor Bartonek, Jiri Bujres, Odrej Vystavel

Abstract

The aim of the article is to present modern geodetic methods used for surveying sacral buildings. These are terrestrial surveying, photogrammetry and drone images. When surveying the building, the digital sketch method was used, which, in addition to the geometry, also captures the topology of the resulting drawing of the surveyed object. The benefit of this method is the automated drawing of a wireframe model of the building in a CAD application. The platform used is QGIS with Python language support. The advantage of this application is its simplicity and availability without a paid license (long term release). The proposed procedure was verified on the Chapel of St. John of Nepomuk, located in Trebic (Czech Republic). The object was surveyed using terrestrial methods and photogrammetry, supplemented by drone images. A textured mesh model for visualization of the chapel was created from the photogrammetric method. Finally, a model (scale 1:250) of the chapel was created on a 3D printer. To check the accuracy of the object's measurement, a control measurement was performed, during which it was found that the chapel's measurement was made in the 1st accuracy class according to ISO CSN 01 3410. All outputs are made in the spatial reference systems S-JTSK and BPV (National Grid of the Czech Republic).

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