High-Precision Tower Mapping | Geosun GS-130X UAV LiDAR System

Sub-Millimeter Heritage Preservation

Geosun GS-130X UAV LiDAR Captures Wuhan’s Ziyang Pavilion

The Challenge

Ziyang Pavilion (est. 1487), a heritage site in Wuchang, Wuhan, required non-contact, high-precision documentation due to:

• 85% summer humidity causing wooden joints to expand

• Constant cargo ship vibrations from the nearby Yangtze River

217 interlocking dougong brackets with sub-centimeter tolerances

• Only 2-hour daily scanning windows due to heavy tourist traffic

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Our Solution

1. Hardware Deployment ： GS-130X

• Flight Altitude: Operated at 28m, below lightning rods

• Effective Range: Covered entire main hall and annexes with 80m@10% range

• Precision: Achieved absolute accuracy of 10cm@100m; verified at 4.3cm error using known stone lion dimensions

• Point Cloud Density: Over 228 pts/m² at 50m height

• Scanner Specs: 32-channel LiDAR with double echo, 1.28 million pts/sec

• 360° field of view ensured no blind spots

2. Software Breakthroughs

• 37,000-component parametric model enables digital preservation and virtual disassembly

• Risk heatmap flagged 12 critical areas, with max beam deflection at 4.1cm

• AR assembly guides projected onto structures for real-time reference by craftsmen

Restorer’s Reaction

“The dougong joint scans frightened our veteran craftsmen – their caliper measurements matched the software data down to 0.3mm.”