[4] [4] CAI S S, ZHANG W M, LIANG X L, et al. Filtering airborne LiDAR data through complementary cloth simulation and progressive TIN densification filters［J］. Remote Sensing, 2019, 11(9): 1037.

[9] [9] XU Y,QIU Z W,YUE D J.Segments-based progressive TIN densification filter for DTM generation from airborne LIDAR data［J］.High Technology Letters,2017,23(1):16-22.

[13] [13] ZHOU B, YAN Y G, DAI H Y, et al. Mining subsidence prediction model and parameters inversion in mountainous areas［J］. Sustainability, 2022, 14(15): 9445.

[16] [16] KHAMENEIFAR F, GHORBANI H. On the curvature estimation for noisy point cloud data via local quadric surface fitting［J］. Computer-Aided Design and Applications, 2018, 16(1): 140-149.