Once we know what you will be using your eBIM model for, we can recommend the level of detail and accuracy to suit your requirements.
Our 3D laser survey creates a highly detailed POINT CLOUD, this provides a wealth of detail for the surveyor but can be difficult for other parties to interprete.
This is because of the sheer size of the point data. An individual scan is typically about 150MB in size. A typical project of a house or shop on a couple floors would be about 50 scans, this equates to 7.5GB. Big projects can be up to 500 scans that’s 75GB!! If you’re working with point data then you need to have the right hardware and plug-ins in place to manipulate this amount of information.
The eBIM process is to convert this large point data into accurate parametric REVIT models, this way our clients can easily work with the survey results without the associated cost and training required to manipulate point data.
Using a number of techniques we can bring the point cloud data directly into Revit. Once in Revit we can trace around the point data with our Revit families quickly building up a 3D model with our point cloud as a reference.
Revit was not initially designed to model existing buildings, and although it is possible to model exactly to the scan data, this will create models which are very large. To this end we will normally make some assumptions in the modelling process and use standard Revit Families as much as possible (unless the client requests otherwise) For example slight deviations in walls etc will be straightened as long as we can retain at least 25mm accuracy.
If you already have a set of company specific standards, please supply us with your generic template which will be used in confidence.
Modelling from laser scan data requires a number of cutting edge technologies. eBIM utilise the latest automatic feature recognition algorithms to automatically extract polylines direct from the point cloud, this combined with the latest Revit 2012 point cloud support and our Webshare remote viewing software, allows us to develop Revit 2012 models quickly and accurately.
Revit is not backward compatible and for us to be able to utilise the 2012 point cloud support, the deliverables must be in the 2012 version. If you require your eBIM model in a previous version this needs to be clearly stated before the project is started as it requires us to use a different modelling method.
The only way to bring point cloud data into older versions of Revit is to create scaled images. Using PointCAB software we can instantly generate crystal clear accurate floor plans and elevations, which are brought into Revit in their correct locations and used to trace around with Revit families.