As most Architects & Contractors switch to a BIM workflow using Autodesk Revit, the demand for as built models for retrofits of existing structures is increasing. The current view is that creating an accurate as built of an existing building is costly and time consuming.
Using the latest 3D laser scanning technology and some cutting edge workflows, Digital Surveys can now quickly and efficiently convert point cloud data to full Revit models.
Workflow
- Data is captured using a Faro Photon 120 3D laser scanner. Currently the fastest laser scanner on the market, it is capable of processing up to 950,000 points of data per second.
- Multiple scans are taken from different locations to ensure that the entire site is covered and targets are used to join the individual scans together.
- Back in the office the data is processed overnight using algorithms which search for corresponding targets.
- This produces the full point cloud, it is then cleaned of unwanted noise caused by cars or people walking past the scanner and then split up into manageable chunks. As the point cloud can be made up of millions of points, quite often it is decimated down to an acceptable level.
- Using the new PointCab software scaled elevations are created from the point cloud and inserted into Revit at their correct co-ordinates.
- These images are then quickly traced using Revit families to build an accurate model.
- The final model can then be brought in Autodesk Navisworks and clashed against the point cloud.
Deliverables: Revit Model
We can provide a detailed Revit model to your specification. Please request a specification from us, you can then simply add or remove the level of detail required from the final model. This allows us to quote competitively and not waste time modelling unnecessary elements.
POINTCLOUD
We provide the full point cloud in Autocad 2011 format plus free viewing software. Using Pointools the fastest point cloud viewer on the planet, you can interogate the data with out reducing quality.
WEBSHARE
Webshare internet viewer. This allows the client to view the site from each indivudal scanner location virtually. This is becoming an invaluable tool for our client who can check vital details without returning to site.
ORTHO-IMAGES
For historic biuildings there will probably be architectural features you want recording but cant afford to model in 3D. In this case we can create a scaled rectified image from the point cloud and embed it into its correct elevation in Revit.
