Abstract
Abstract. Cultural heritage is the evidence of the past; monumental objects create the important part of the cultural heritage. Selection of a method to be applied depends on many factors, which include: the objectives of inventory, the object's volume, sumptuousness of architectural design, accessibility to the object, required terms and accuracy of works. The paper presents research and experimental works, which have been performed in the course of development of architectural documentation of elements of the external facades and interiors of the Wilanów Palace Museum in Warszawa. Point clouds, acquired from terrestrial laser scanning (Z+F 5003h) and digital images taken with Nikon D3X and Hasselblad H4D cameras were used. Advantages and disadvantages of utilisation of these technologies of measurements have been analysed with consideration of the influence of the structure and reflectance of investigated monumental surfaces on the quality of generation of photogrammetric products. The geometric quality of surfaces obtained from terrestrial laser scanning data and from point clouds resulting from digital images, have been compared.
Highlights
Generation of precise and, at the same time, high resolution architectural documentation, acquired on the basis of terrestrial laser scanning or dense point clouds from digital images is still and open issue, which forms many challenges (Boehle, 2004; Remondino, 2006, Remonidno 2008; Droninger, 2013; Mousa, 2014)
Data processing algorithms are intensively developed with consideration of high resolution orthoimage processing or generation of accurate vector drawings, limitations concerning the utilisation of measuring sensors are still the issue which should be solved (Boehler, 2004)
In the case of a fragment projected on the basis of data from terrestrial laser scanning the mean distance between the points and the plane was equal to 2 1 mm; 31% of points projected ± 1- 2 mm, 40% about ± 2- 3 mm and 29% less than 1 mm, as a n average
Summary
Generation of precise and, at the same time, high resolution architectural documentation, acquired on the basis of terrestrial laser scanning or dense point clouds from digital images is still and open issue, which forms many challenges (Boehle, 2004; Remondino, 2006, Remonidno 2008; Droninger, 2013; Mousa, 2014). One of those issues, which relatively often occurs is the lack of possibility to fully visualise the entire object using one data source (one measuring sensor) (Markiewicz 2012) Such limitations may result from the lack of access or from invasive operations of the measuring system. Another issue is related to the complicated geometry, as well as the structure and texture of investigated surfaces. An alternative for such limitations seems to be utilisation of many sensors, mainly terrestrial laser scanning, and digital images (Angello, 2007). Such systems are often complementary, in particular, in the cases of measurements of complicated, monumental surfaces
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