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Bulgarian Antarctic Chapel 3D Laser scanning

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Fly-through from Poisson reconstruction of the "St. Ivan Rilski" chapel at the Bulgarian Antarctic Station on Livingston Island. The chapel “St. Ivan Rilski” lies within the premises of the Bulgarian Antarctic Station on Livingston Island, and is one of the first orthodox buildings established there. Its interior is elaborately pained with icons, created in situ by the painter Ganka Pavlova. Due to the remote location of this chapel, except scientist and station logistics crew outsiders rarely visit it. This was the main driver for a 3D building digitalization project, organized during the 25th Bulgarian Antarctic Expedition. A team from the University of Mining and Geology “St. Ivan Rilski” (Bulgaria) and Istanbul Technical University (ITU) performed the required field operations. All data is collected via terrestrial 3D laser scanning. A Stonex x300 instrument is used at maximum resolution (16000 hor. x 4000 vert. points per scan) with photo capturing plus external dual-frequency GNSS for georeferencing. The chapel’s interior and exterior is composed of 10 colored point clouds, co-registered and meshed together using the Stonex 3D Reconstructor software.

The meshing was performed by using interpolative technique, with size of each triangle at 16 pixels plus vertex coloring. If the approximation error was too high, the triangle was subdivided in smaller pieces. The 3D model is created by minimization of the sum of squared distances between the interpolated surface and the data points. A weighting strategy is applied by using less triangles on planar regions, satisfying an approximation error threshold. The 10 mesh models are subsequently exported separately in Virtual Reality Modeling Language format (.wrl) for further processing.

Music - Megaloschemos II (Bulgarian Orthodox Hymn):

youtube.com/watch?v=o81A31hlgEA

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