ISEP - DM – Engenharia Civil
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Browsing ISEP - DM – Engenharia Civil by Subject "2D Modeling"
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- Digital surveys and BIM modelling processes and semi-automationPublication . Ferreira, Vinícius do Vale; Ribeiro, Diogo Rodrigo FerreiraThis study aims to enhance the use of advanced technologies to improve the accuracy and efficiency of 3D geometric surveys in civil engineering applications. The thesis proposes a workflow that includes in situ surveys, with and without topographic support, 2D and 3D modeling from point clouds, as well as a contribution to the automation of 3D modeling through a dedicated algorithm developed in VPL and Python. Digital surveys represent a significant advancement in documenting existing constructions, providing faster, safer, and more accurate measurements compared to traditional methods. The development of the script seeks to facilitate the modeling of structural elements from point clouds, optimizing time and reducing human errors, allowing for minor adjustments to the final model. This script has been detailed so that future work can continue to automate this workflow, which consequently increases productivity in the construction sector. The first stage of this study, conducted in collaboration with the Warsaw University of Technology, focused on a comparative analysis between the design dimensions and the actual dimensions of a structural connection plate of a railway bridge, using photogrammetry and laser scanning. In the photogrammetry process, photographs obtained from a drone without GNSS were used to create a point cloud, referenced and adjusted iteratively. The point cloud was segmented using the RANSAC method to facilitate 2D modeling. The second part aimed at semi-automatic 3D modeling, creating an algorithm based on visual programming and Python, using the results of a survey of an industrial warehouse with georeferenced photographs, laser scanning, and topographic support. This point cloud also had to be segmented using the RANSAC method to be used as input for the semi-automatic 3D modeling script.