Estimation of Accumulation Amount of <i>Phyllostachys Pubescens</i> Based on LiDAR Point Cloud Density of Canopy

Number	Length /cm	Volume /cm³	Number	Length /cm	Volume /cm³	Number	Length /cm	Volume /cm³
1	7.8	0.10	13	60.0	1.86	25	138.0	20.25
2	14.8	0.20	14	69.0	3.20	26	144.0	22.65
3	15.5	0.20	15	77.0	4.55	27	135.0	17.25
4	18.3	0.25	16	81.0	4.65	28	164.5	28.76
5	22.5	0.40	17	87.0	5.53	29	172.0	35.25
6	29.7	0.50	18	95.7	6.51	30	175.2	39.35
7	36.5	0.70	19	96.5	6.43	31	176.0	39.35
8	37.0	1.25	20	105.0	9.10	32	157.0	27.95
9	45.1	1.18	21	108.0	8.40	33	194.0	45.10
10	51.0	1.52	22	117.0	12.50	34	183.0	39.70
11	52.3	1.61	23	123.0	14.45	35	198.0	42.67
12	54.5	1.74	24	133.0	17.50	36	187.0	39.35

Table 2. Surface area and point cloud density of sample bamboo poles

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Table 2. Surface area and point cloud density of sample bamboo poles

Number	Surface area /cm²	Number of point clouds	Point cloud bulkdensity /cm^-3	Point cloud arealdensity /cm^-2
Bamboo pole 1	3653.39	27317	0.00101174	7.477
Bamboo pole 2	2449.22	19795	0.000733148	8.082
Bamboo pole 3	1915.41	14519	0.000537741	7.580
Bamboo pole 4	1602.34	11783	0.000436407	7.353
Average				7.631

Table 3. Point cloud density and volume of bamboo crown branches

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Table 3. Point cloud density and volume of bamboo crown branches

Number	Number of point clouds	Point cloud density /cm^-3	Volume /cm³
Bamboo crown branch 1	273659	0.0101355	231.5070
Bamboo crown branch 2	524001	0.0194074	736.8833
Bamboo crown branch 3	421903	0.0156260	635.0164
Bamboo crown branch 4	378124	0.0140046	411.2008

Table 4. Calculation error of branch volume of 5th sample
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Table 4. Calculation error of branch volume of 5th sample
Number Number ofpoint clouds Point clouddensity /cm^-3 Volume /cm³ Calculatedvolume /cm³ Absoluteerror /cm³ Relativeerror /%
Bamboo crown branch 5 468193 0.0173405 597.243 648.890 51.647 8.64

Table 5. Calculation error of bamboo pole volume of 5th sample
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Table 5. Calculation error of bamboo pole volume of 5th sample
Number Number ofpoint clouds Point clouddensity /cm^-3 Radius /cm Volume /cm³ Calculatedvolume /cm³ Absoluteerror /cm³ Relativeerror /%
Bamboo pole 5 13573 0.000503704 1.87 1740.920 1663.052 77.868 4.47

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Su Detian, Wu Linlin, Zhang Fanyi, Xu Wenbing. Estimation of Accumulation Amount of Phyllostachys Pubescens Based on LiDAR Point Cloud Density of Canopy[J]. Chinese Journal of Lasers, 2020, 47(4): 404001

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