High-Accuracy Scan-to-BIM Project – Integration of Leica RTC360 and Leica 802 Power Total Station

3DScan.vn executed a Scan-to-BIM project covering an area of 3,000 m², utilizing 3D laser scanning technology combined with Leica RTC360 and Leica 802 Power total station. The system was controlled using GCPs with ±5 mm accuracy, ensuring that the BIM model achieved LOD 350 standards for design and technical verification purposes.

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1. Project Technical Overview

• Scan coverage: 3,000 m² – full building and detailed MEP structures.
• Equipment: Leica RTC360 – up to 2 million points/second; Leica 802 Power – GCP positioning ±5 mm.
• Number of scan stations: 2,000 TLS stations, average density 35 stations per 100 m².
• Project duration: 5 days (including control point setup, GCP survey, scanning, and data registration).
• Model accuracy: ±5 mm in VN-2000 coordinate system, meeting construction verification standards.
• Model level: BIM LOD 350 – including architecture, structure, and MEP systems.

2. Technical Workflow

The project was implemented using a hybrid registration workflow combining Cloud-to-Target (based on GCPs) and Cloud-to-Cloud (for internal alignment optimization), ensuring consistent and accurate data across the entire project.

• Established 20 GCPs across the site, measured using Leica 802 Power.
• Positioned RTC360 scan stations in a 5–8 m grid, ensuring ~60% overlap.
• Performed registration in Cyclone REGISTER 360 with RMS error controlled below 5 mm.
• Exported standardized point cloud (E57) and developed BIM LOD 350 model in Revit.

3. Results and Applications

Within 5 days, 3DScan.vn successfully completed the scanning and delivered a BIM LOD 350 model with ±5 mm accuracy. The dataset supports existing condition verification, design deviation analysis, as-built documentation, and BIM-based MEP renovation.

Conclusion

The integration of Leica RTC360 with Leica 802 Power enables the generation of high-accuracy Scan-to-BIM data with efficient project timelines. This approach provides an optimal solution for industrial, commercial, and infrastructure projects requiring technically reliable 3D models for design, verification, and facility management.