Point Cloud to CAD Process
The process of extracting accurate 2D CAD drawings from 3D point cloud data.
Overview
Point cloud to CAD is the process of creating traditional 2D drawings (floor plans, elevations, sections) from 3D scan data. This bridges the gap between modern scanning technology and conventional documentation needs.
Why Extract 2D from 3D?
Despite 3D capabilities, many workflows still require 2D drawings.
- Permit submissions often require 2D plans
- Contractors prefer familiar 2D formats
- Print-ready documentation needs
- Simplified communication tool
- Integration with legacy systems
The Process
Point cloud to CAD involves several steps from data preparation to final drawings.
- 1. Import point cloud to CAD software
- 2. Orient and scale to project coordinates
- 3. Create section cuts at appropriate heights
- 4. Trace geometry using point cloud as reference
- 5. Add annotations, dimensions, symbols
- 6. Quality control against point cloud
- 7. Export to required formats
Software Options
Several software platforms support point cloud to CAD workflows. AutoCAD with ReCap integration is common. Leica Cyclone offers dedicated tools. Many specialists use a combination of point cloud viewers and CAD software.
Accuracy Considerations
The CAD output accuracy depends on scan quality, technician skill, and drawing standards. Typical accuracies range from ±1/4" for architectural drawings to ±1/8" for detailed MEP documentation.
Deliverable Types
Common point cloud to CAD deliverables include floor plans, reflected ceiling plans, elevations, building sections, details, and site plans. Format is typically DWG with PDF exports.
Key Takeaways
2D CAD drawings remain essential for many workflows
Section cuts through point clouds guide accurate tracing
Accuracy depends on scan quality and technician skill
Common formats include DWG and PDF
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