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Publication Detail
From Point Cloud to Building Information Model: Capturing and Processing Survey Data Towards Automation for High Quality 3D Models to Aid a BIM Process
  • Publication Type:
    Thesis/Dissertation
  • Authors:
    Thomson CPH
  • Date awarded:
    28/04/2016
  • Supervisors:
    Boehm J,Ellul C
  • Status:
    Accepted
  • Awarding institution:
    UCL
  • Date Submitted:
    28/04/2016
  • Keywords:
    laser scan, survey, 3D model, BIM, Building Information Modelling, IFC, point cloud
Abstract
Building Information Modelling has, more than any previous initiative, established itself as the process by which operational change can occur, driven by a desire to eradicate the inefficiencies in time and value and requiring a change of approach to the whole lifecycle of construction from design through construction to operation and eventual demolition. BIM should provide a common digital platform which allows different stakeholders to supply and retrieve information thereby reducing waste through enhanced decision making. Through the provision of measurement and representative digital geometry for construction and management purposes, surveying is very much a part of BIM. Given that all professions that are involved with construction have to consider the way in which they handle data to fit with the BIM process, it stands to reason that Geomatic or Land Surveyors play a key part. This is further encouraged by the fact that 3D laser scanning has been adopted as the primary measurement technique for geometry capture for BIM. Also it is supported by a laser scanning work stream from the UK Government backed BIM Task Group. Against this backdrop, the research in this thesis investigates the 3D modelling aspects of BIM, from initial geometry capture in the real world, to the generation and storage of the virtual world model, while keeping the workflow and outputs compatible with the BIM process. The focus will be made on a key part of the workflow for capturing as-built conditions: the geometry creation from point clouds. This area is considered a bottleneck in the BIM process for existing assets not helped by their often poor or non-existent documentation. Automated modelling is seen as desirable commercially with the goal of reducing time, and therefore cost, and making laser scanning a more viable proposition for a range of tasks in the lifecycle.
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