Point Cloud Scanning to a BIM Model
Existing buildings almost never have drawings that reflect reality. 3D scanning turns the building — as it truly is — into an accurate point cloud, and from there into a BIM model you can design and build on. How it works, when it’s needed and what to define up front.
What is a point cloud?
A 3D scan — using a laser scanner or photogrammetry — documents the building as it truly is: millions of measurement points, each with a precise position in space. The result is called a point cloud — an accurate three-dimensional photograph of existing conditions, with every wall, system, beam and detail.
But a point cloud is only documentation. You can’t design with it, produce drawings from it or quantify from it. For that you need to turn it into a model — and that is exactly Scan to BIM.
When do you need Scan to BIM?
- Renovation of an existing building — old drawings almost never reflect what was actually built. Design on an accurate model instead of guesses.
- Building additions — connecting a new addition to an existing structure requires knowing exactly where every wall, beam and system is.
- As-built documentation — at the end of construction, a model reflecting what was actually built is an asset for maintenance and facility management for years.
- Deviation checks — comparing as-built reality against the design model, and catching deviations before they become a problem.
What does the process look like?
- Defining the need — which areas to scan, which disciplines to model and to what level of detail (LOD).
- On-site scanning — scanning the building from multiple stations, without disrupting ongoing activity.
- Processing and registration — merging the scans into a unified, aligned point cloud.
- Modeling — building the BIM model over the cloud: walls, ceilings, openings, structure and systems — at the defined level of detail.
- Quality control — checking the model against the point cloud to verify accuracy, before delivery.
The difference is simple: the cloud is a photograph — the model is a working tool. Whoever plans a renovation or addition based on old drawings discovers the gaps on site; whoever plans on an accurate scan-based model closes them in advance.
What should be defined up front?
The quality of a Scan to BIM project is determined by the definitions, not just the scan: level of detail (architecture and structure only, or MEP systems too?), required accuracy according to the model’s purpose, and a delivery format that fits your design team. Defining this correctly up front saves unnecessary costs — you don’t model at a level of detail nobody needs.
Frequently Asked Questions
What is the difference between a point cloud and a BIM model?
A point cloud is a "3D photograph" — millions of measurement points documenting the building as it is, with no intelligence. A BIM model is a working tool: walls, ceilings, systems and smart elements you can design with, produce drawings from and quantify. Scan to BIM is the bridge between the two.
Which buildings can be scanned?
Almost any building: residential, offices and commercial, public buildings, industrial facilities and dense technical rooms. Scanning is non-invasive and does not disrupt ongoing activity in the building.
How long does a Scan to BIM process take?
The scan itself is relatively fast — hours to a few days, depending on building size. Modeling time depends on scope and the required level of detail. Send the building details and you will receive a time and price estimate within 24 hours.
What do you receive at the end?
A BIM model at the pre-defined level of detail (in Revit or IFC format as needed), alongside the original point cloud — so you can always go back to the source and verify accuracy.