3D laser scanning, data capture - survey to BIM

Non-intrusive 3D Laser scanning devices have become mainstream tools for surveying as they provide a safer, richer and more rapid method of capturing highly accurate “as-is” site data.

Traditional measuring techniques can only be so accurate. 3D laser scanning objectively measures spaces so every angle is precisely calculated with little room for error. This means digital models are incredibly accurate, showing the true conditions of the space.

There are also other value-added benefits to be gained using a laser scanner:

• Survey data can be easily obtained beyond the project limits;
• Scanning eliminates the need for field revisits as nothing gets missed;
• The data output (point cloud) interfaces directly with CAD for easy analysis and manipulation;
• Laser scanners come in a variety of different platforms and types, allowing surveyors to use the right tool for the job every time.

Revit modelling

We can deliver comprehensive surveys and BIM ready models authored in Revit® of your existing building to provide you with accurate base data on which detailed design development can take place.

The level of survey you require is a key factor when considering a Revit® model for BIM and of equal importance is the need to clearly define which building and elements of the structure are to be included in your survey from the outset.

Where high level detail is required within the resultant Revit model, the laser scanning needs resolution to be increased which increases the time on site spent surveying and ultimately the cost to you.

We work only with trusted surveyors who have robust specifications in place to meet your expectations. Typical specifications relate back to the level of detail (LOD), and these are summarised below:

• LOD1 – Mass modelling: contains the basic outline of buildings and structures (no architectural details).
• LOD2 – Base survey of structural components: contains major structural openings.
• LOD3 – Standard model: contains the principal basic architectural details and structures, suitable to generate survey plans, elevations and sections. Basic families will be built to a default setting and may include main Mechanical and Electrical (ME) services or Furniture, Fixtures and Equipment (FFE) in outline form.
• LOD4 – Detailed model: contains detailed architectural and structural features. Families will be built to a greater detail and principle finishes and construction will be indicated where known. The resultant model will be suitable for generating survey plans, elevations and sections. A detailed model is suitable for recording historic or listed buildings. The main and subsidiary MEP and FFE elements will be included, if required.