Photogrammetric Methods for Data Collection and Analysis at Cultural-Heritage Sites in Danger of Destruction

Photogrammetric methods for collecting and analyzing data at disappearing cultural-heritage sites represent a solution that will not only be the basis for compiling graphic measurement and visual materials, but will also serve for training neural networks that will fill in lost architectural and picturesque elements of architectural structures. The object of the study is a church complex in Ostrov village, Gavrilov-Yamsky district, Yaroslavl oblast. To obtain a three-dimensional model, ground and aerial photography with an unmanned aerial vehicle (UAV), geodetic measurements, and an architectural survey are carried out. The results are: a digital terrain model, a model of the church complex (inside and outside) in the form of a dense point cloud and a polygonal model. The models are created in real dimensions with accuracies corresponding to a scale of 1 : 50 or 1 : 200.