Unfinished Interior 3D Mapping | Geosun GS-200G Handheld LiDAR System

A client required a complete 3D mapping of an unfinished interior building to capture its structural layout, room geometry, and overall spatial configuration. The objective was to generate an accurate 3D model suitable for renovation planning, design coordination, BIM development, and digital-twin applications.

• LiDAR System: Geosun GS-200G Handheld LiDAR
• Sensor: Livox Mid-360
• Technology: Indoor SLAM + high-density point cloud acquisition
• Point Rate: 200,000 pts/s
• Accuracy: ≤1 cm relative, ≤5 cm absolute (handheld SLAM)

The GS-200G’s lightweight design and SLAM algorithm made it ideal for scanning GNSS-denied indoor environments with complex layouts.

Mapping an unfinished interior comes with several challenges:

• No GNSS reception and no pre-installed reference points
• Multiple rooms, corridors, and structural obstructions
• Raw building environment with inconsistent lighting
• Requirement for fast, continuous, and high-precision capture

The team adopted the GS-200G handheld SLAM workflow, enabling efficient and flexible movement inside the building:

1.   Walk-through scanning of rooms, corridors, staircases, and open areas
2.   Continuous LiDAR acquisition with Livox Mid-360’s 360° field of view
3.   Real-time SLAM ensuring stable trajectory and loop closure
4.   Post-processing for point cloud optimization and merging
5.   Reconstruction of a complete, measurable 3D model of the entire unfinished interior

The workflow required minimal setup—no ground control points or static scanner repositioning were needed.

The GS-200G successfully produced a high-precision, fully connected 3D point cloud representing the entire unfinished interior.
Key achievements include:

• Clear visualization of walls, columns, beams, stairs, and spatial boundaries
• Accurate geometry suitable for measurement and downstream planning
• Smooth, continuous point cloud without major SLAM drift
• Substantial time savings compared to static scanning or manual measurement
• A highly flexible solution for projects requiring rapid deployment

The resulting 3D model supports:

• Renovation and interior design
• BIM model creation
• Construction verification
• Space analysis and layout planning
• Digital-twin documentation
• Long-term project management and record keeping

With its portability, efficiency, and precision, the GS-200G is a powerful tool for indoor 3D mapping of unfinished interiors, especially when fast delivery and reliable results are crucial.