ASBUILT LASER SURVEY
eBIM modelling historic buildings in Revit.
3D DATA CAPTURE
Adjacent to Charlotte Square the Mews Building in Edinburgh is an old heritage building made up of workshops and store rooms. The Mews building is connected to Charlotte square via an undergroud tunnel and also backs on to Hope Street Lane.
The site was scanned using the Faro Photon120, with colour images applied to the exterior of the building. By scanning the exterior in colour building material type can easily be identified.
Once scanned the data was registered in Faro Scene 4.8 and exported to PointCAB. By utilising pointCAB floor plans were generated for each level. The point CAD software generated 40m tiled images of the floor plans which are snapped together in Revit like a jigsaw. As the images are generated in the same co-ordinates system the upper floor tiles snap directly above the ones below. This makes it very easy to build up an accurate 2d view of all the levels.
Modelling took a approx 1 week to convert all the data to an accurate Revit model. When modelling very old properties, some assumptions need to be made on the level of accuracy.
Most of the wall were out of plumb and suffered from deformation. To try and model this accurately in Revit would require lots of inplace masses. When modelling we try and use the standard revit families as much as possible, therefore walls were straightened within a 25mm tolerance.
Once the building had been modelled it was dropped into the overall site plan to sit in its correct real world co-ordinates next to Charlotte Square.