Multi-Scale Progressive Digital Terrain Model Construction Method Based on Backpack LiDAR Point Cloud

Zhenyang Hui; Na Li; Haiying Hu; Zhuoxuan Li

doi:10.3788/CJL202249.0410001

Chinese Journal of Lasers, Volume. 49, Issue 4, 0410001(2022)

Multi-Scale Progressive Digital Terrain Model Construction Method Based on Backpack LiDAR Point Cloud

Zhenyang Hui^*, Na Li, Haiying Hu, and Zhuoxuan Li

Author Affiliations

School of Geomatics, East China University of Technology, Nanchang, Jiangxi 330013, China

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Figures & Tables(8)

Fig. 1. Flow of multi-scale progressive DTM construction method

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Fig. 2. Multi-scale progressive fitting surfaces. (a) Initial fitting surface; (b) progressive fitting surface; (c) final fitting surface

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Fig. 3. Research area scenarios. (a) Scene 1; (b) scene 2

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Fig. 4. Initial point cloud data. (a) Schematic of sample 1; (b) schematic of sample 2; (c) schematic of sample 3; (d) schematic of sample 4

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Fig. 5. Filtering error accuracy and Kappa coefficient distribution of four filtering algorithms. (a) Comparison of total error; (b) Kappa coefficient distribution

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Fig. 6. DTM constructed by different filtering methods

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Table 1. MPD error results　unit: %
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Table 1. MPD error results　unit: %
Sample E_Type1 E_Type2 E_Total I_Kappa
Sample 1 12.93 3.76 6.06 83.78
Sample 2 8.81 7.00 7.59 82.98
Sample 3 11.12 6.97 7.87 78.03
Sample 4 20.04 6.70 9.98 73.13
Average value 13.23 6.11 7.88 79.48

Table 2. Error results of four filtering algorithms　unit: %

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Table 2. Error results of four filtering algorithms　unit: %

Sample	Algorithm	E_Type1	E_Type2	E_Total	I_Kappa
Sample 1	MPD	12.93	3.76	6.06	83.78
	LAStools	59.99	0.47	15.10	49.27
	MCC	41.22	0.99	10.88	66.33
	CSF	56.68	0.70	14.46	52.22
Sample 2	MPD	8.81	7.00	7.59	82.98
	LAStools	60.70	2.08	15.33	45.93
	MCC	50.76	3.17	13.95	53.64
	CSF	57.21	3.57	15.71	46.64
Sample 3	MPD	11.12	6.97	7.87	78.03
	LAStools	63.17	0.12	13.89	47.44
	MCC	51.94	0.70	11.89	57.62
	CSF	59.66	0.79	13.65	49.74
Sample 4	MPD	20.04	6.70	9.98	73.13
	LAStools	68.81	0.53	19.81	38.54
	MCC	61.32	0.90	17.96	46.02
	CSF	63.93	1.44	19.07	42.38

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Zhenyang Hui, Na Li, Haiying Hu, Zhuoxuan Li. Multi-Scale Progressive Digital Terrain Model Construction Method Based on Backpack LiDAR Point Cloud[J]. Chinese Journal of Lasers, 2022, 49(4): 0410001

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