| Popis: |
Devastating earthquakes that hit the area of the City of Zagreb on October 22, 2020, and the area of Petrinja, Sisak and Glina on December 29, 2020, have caused great damage to numerous cultural and historical heritage sites. For most of the earthquake-affected buildings, documentation was insufficient or non-existent. Expeditiously applying modern geodetic methods and instruments, the Faculty of Geodesy has established a detailed approach for the protection and preservation of cultural heritage in a crisis. Applying modern methods of documentation and instruments ; terrestrial laser scanners, digital SLR cameras and drones were used to capture the existing condition of the buildings. Based on the collected data of terrestrial and aerial photogrammetry, 3D realistic models of individual objects were made for easier visualization or damage detection, and based on the collected TLS data, high-resolution point clouds were made which were used to create floor plans and damage detection. The advantage of collecting a large amount of data in a short period of time is seen in the level of recorded details. Architects and civil engineers can draw detailed floor plans of the building floors and model individual elements from the point cloud without extensive and demanding fieldwork. All point clouds and 3D models are georeferenced and on a 1:1 scale which makes them suitable for determining the actual dimensions of objects and calculating areas. This approach enables collecting a large amount of data in an abbreviated period of time which is crucial for a crisis such as destructive earthquakes. |
