Abstract
Abstract. The study presents a part of the operational framework of the “Project for Infrastructure and Strategic Strengthening of the Somali National University”, funded by the Italian Agency for Development Cooperation. The project, coordinated by Politecnico di Milano, aims to reconstruct the Gahayr campus of the Somali National University of Mogadishu, which is today almost destroyed due to the civil war. The preliminary phase for reconstruction is a detailed survey of the buildings and the area over which the Campus will be re-built. In a normal situation, the team in charge of the survey would have gone on-site in Mogadishu; nevertheless, the risky local conditions and the Covid-19 pandemic made it impossible to have foreign personnel on-site. Consequently, the choice was to train a local team remotely, giving them the theoretical and practical instruments to face a complete 3D survey of the area and the buildings. Harsh times cannot stop works and activities that usually need the presence of the survey team on the field. Careful planning of the activities, the online staff training and the continuous sharing of the information permitted to get high quality 3D metric results quickly and to have at disposal all dimensional and qualitative valuable information for the project, usable in real-time by the designers and architects without going directly on the site.
Highlights
Preliminary observationsThe preliminary phase for the reconstruction is a detailed survey of the buildings and the area over which the new Campus will be built
The construction of the Gahayr Campus, headquarters of the Somali National University, started in the early '70s with the donation by Italy of 90 hectares of land in the western area of Mogadishu, following a specific cooperation agreement between the Italian Government and the Federal Transitional Government of Somalia
The Gahayr Campus appears in a critical state; many buildings have been demolished, while the remaining ones are in an advanced state of degradation
Summary
The preliminary phase for the reconstruction is a detailed survey of the buildings and the area over which the new Campus will be built. The problem to be solved is how to entrust a complete survey at medium-large scales of representation that requires expensive instrumentation, dedicated training and experience in data processing. The Matterport Pro 2 3D camera was selected to survey the interiors of the buildings with triple goals i) to extract semiautomatically the plans, ii) to have at disposal a raw point cloud model to extract additional measurements and iii) to create a complete virtual tour of the site automatically at disposal for the stakeholder to perform the diagnostic survey. A local company with previous experience in classical topographic surveys was selected and trained remotely, giving them the theoretical and practical instruments to face the complete 3D survey of the terrain and the buildings following the designed pipeline. The local company performed additional measurements: GNSS antenna measurement to georeference and scale the photogrammetric data and total station survey to complete the building survey
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