Photogrammetry proves its worth in 3D documenting Cultural Heritage
The importance of historical buildings in community
A community is most likely defined by its cultural heritage – their past, present and future which shape their identity. Preserving and strengthening of historical constructions over time are vital, because of their high value within the community.
Old masonry buildings are subject to slow ageing processes, which must be monitored in order to prevent irreversible deterioration of materials and structural damage. In addition, monitoring helps to fix the damages done by natural hazards, in particular, earthquakes.
“With 3Dsurvey software we were able to produce the final report that we used for reconstruction of the shed 10x faster. Achieving the same results with traditional surveying equipment would be impossible. With 3Dsurvey time-efficiency is key to success.”A. Kerin, Engineering Surveyor
Within this framework, the selection and use of the right structural modeling tools are key. They help us asses the present state, as well as support the design of the necessary strengthening interventions to maintain the structure.
In this project, we used our photogrammetry software as a tool to create a 3D model, which will serve as a basis for further reconstruction work.
The structure is a garden shed built around 1894. Reconstruction works were needed to strengthen the structure for further decades.
“3Dsurvey photogrammetry software helped us calculate point cloud with extreme accuracy and lifelike texture.”A. Kerin, Engineering Surveyor
The aim was to create a survey-grade accurate model of the shed so that it could be revitalized. We positioned 4 GCPs on the facade of the shed, to improve the accuracy of photos taken with the smartphone. We have captured more than 900 images to achieve more than 80% overlap.
Project tools and specs:
- Camera: Olympus E-M1, focal length 12mm
- Used images: 914 with 80% horizontal and vertical overlap
- Flying height: hand shots
- Orientation: local coordinate system – 4 GCP measured with measuring tape on facade
- Time of processing data: BA: 4 hours, Orientation: 20 min, Dense reconstruction: 12 hours
- No. of point cloud points: 96.788.654
- Area size: 23,13 m2
More articles about photogrammetry
- Using photogrammetry software for Indoor mapping of a two-storey house.
- Ljubljana Castle Wine Cellar Patio Renovation
- How to combine two different technologies: bathymetry and photogrammetry
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