BIM 3D Modelling From Point Clouds
LiDAR (light detection and ranging) is an optical remote-sensing technique which take samples of the surface of the earth, obtaining accurate x,y,z dimensions. All data collected from LiDAR compounds the Point Clouds. Point Clouds are vectors based structure - each point has its XYZ coordinates and attributes called components which represent time, flight line, intensity, color, etc. Point cloud data can be managed, visualized, analyzed, and shared using different CAD software.
SDEA team works merging point clouds with design models to create a 3D model which enable efficient design review, effective team collaboration and meets BIM criteria included in BS 1192.
This integrated model allows the creation of 4D schedules showing each construction phase, supports project review, signal sighting, enables clash detection and is even used in trainings for new drivers. 4D technology directly links the 3D model and the construction plan and allows planners to schedule and coordinate the tasks which can be visualized as a ‘virtual construction model’.
SDEA team has developed models for on route sections in the line which links Swansea to Cardiff. We have represented the lineside equipment all along the route as well as any visible element from the tracks as walls, fences, buildings, power supply towers, signal and traffic lights.
SDEA has, as well, developed models for every station of the same Welsh route, including the major ones: Swansea and Cardiff Central Station. These models include every element in the stations with a realistic representation of platforms and buildings (with their respective furniture as doors, windows and seats), station lamps, signals, fences, stairs, footbridges, canopies as well as the tracks.
3D model is upgraded with photo-realistic textures which are created with a material library from CAD software . In this way a realistic model of the railway is built providing a virtual realistic design.