When BIM Meets Point Clouds: A Practical Guide
Combining IFC models with laser scan data for construction verification, clash detection, and as-built documentation.
Why Combine BIM and Point Clouds?
Building Information Models (BIM) represent the design intent — what was planned. Point clouds from laser scanning capture as-built reality — what was actually constructed. Overlaying these two data sources reveals discrepancies, validates construction progress, and creates accurate as-built documentation.
Common Use Cases
1. Construction Verification
Compare the as-built scan against the design model to identify deviations. SkyGIS highlights differences exceeding your specified tolerance threshold.
2. Clash Detection
Identify where installed elements conflict with the design — pipes running through beams, ducts too close to walls, or structural elements out of position.
3. Progress Monitoring
Overlay periodic scans against the BIM model to track construction progress over time. Generate visual reports showing percentage completion by building element.
4. As-Built Documentation
Create accurate as-built records by updating the BIM model based on scan data. This is essential for facility management and future renovations.
How to Do It in SkyGIS
1. Upload your point cloud — E57 or LAS format from any scanner
2. Import the BIM model — IFC format (Enterprise plan)
3. Align the datasets — Use our registration tools or provide a common coordinate system
4. Analyze — Use cross-sections, measurement tools, and deviation coloring to compare
Best Practices
- Scan resolution matters — For construction verification, aim for 5mm point spacing or better
- Coordinate systems — Establish a common reference frame before scanning
- Regular intervals — Scan at consistent project milestones for meaningful progress comparison
- Documentation — Use SkyGIS's annotation tools to mark findings directly in the 3D view