Tongjiang Aerial

The Tongjiang Aerial Dataset consists of four UAV surveys flown on 21 May 2025 above an active limestone quarry in Tongjiang County, Bazhong City, Sichuan Province (China). Panorama scans (3 flights) – synoptic coverage of the quarry and its immediate surroundings; point counts range from 2.31 M to 5.50 M. Detail scan (1 flight) – high-resolution coverage of the excavation itself; 28.40 M points. All missions were flown with a DJI Matrice 4T quad-rotor carrying the factory-calibrated M4E WideCamera (8-bit RGB). Double-grid flight plans ensured at least 75 % sidelap and 85 % forward-lap. Positioning relied exclusively on the on-board RTK module; no ground control points were deployed. Image blocks were processed in DJI Terra v3.7.0 using the High-quality setting on a single workstation.