Popis: |
Latest Lidar scanner technologies have great potential to contribute to construction processes by capturing accurate data in a convenient way. In particular, handheld Lidar scanners have the potential to provide real-time data from insitu buildings that are under construction or will be redesigned during construction. Focusing on the advantage of handheld Lidar scanners and photogrammetry technologies, this paper presents an integrated framework to revise digital drawings based on updated data from construction objects. The data was collected using handheld scanners for two floors of a building. Additional data was collected using terrestrial scanners including point clouds and photos in order to compare different Lidar technologies and update the data. The findings show how handheld laser scanners differ from terrestrial scanners: efficient for updating data to assist designers to revise digital construction drawings, easy to use without high-skilled labour required, and less expensive than terrestrial scanners. The procedures of creating models from different tools, namely handheld and terrestrial Lidar scanners, are compared to evaluate the feasibility of semi-automatic data acquisition for creating Building Information Models (BIM). It was found that the framework using handheld Lidar, potentially enables designers to quickly revise drawing of complex objects. The proposed study is a step towards semi-automated modelling and drawing revision of construction objects. |