Rocky Desertification Information Extraction in Karst Terrain Complex Area Based on Endmember Variable

Ou RUAN; Sui-hua LIU; Jie LUO; Hai-tao HU

doi:10.3964/j.issn.1000-0593(2022)07-2269-09

Journals >Spectroscopy and Spectral Analysis >Volume 42 >Issue 7 >Page 2269 > Article

Spectroscopy and Spectral Analysis
Vol. 42, Issue 7, 2269 (2022)

Rocky Desertification Information Extraction in Karst Terrain Complex Area Based on Endmember Variable

Ou RUAN^{1; 2;}, Sui-hua LIU^{1; 2; *;}, Jie LUO^{1; 2;}, and Hai-tao HU^{1; 2;}

Author Affiliations

1. School of Geography and Environmental Science, Guizhou Normal University, Guiyang 550025, China

show less

DOI: 10.3964/j.issn.1000-0593(2022)07-2269-09 Cite this Article

Ou RUAN, Sui-hua LIU, Jie LUO, Hai-tao HU. Rocky Desertification Information Extraction in Karst Terrain Complex Area Based on Endmember Variable[J]. Spectroscopy and Spectral Analysis, 2022, 42(7): 2269 Copy Citation Text

show less

Fig. 1. Location and topographic map of study area

Download full size | View in the Article

Fig. 2. Schematic diagram of VCA principle

Download full size | View in the Article

Fig. 3. Spectral curves of local objects

Download full size | View in the Article

Fig. 4. Prediction percentages of bare rock and vegetation coverage in light and shadow areas

Download full size | View in the Article

Fig. 5. Comparison of vegetation coverage prediction results of shadow areas with high-definition images by various methods

Download full size | View in the Article

数据源	时间	参数	获取方式
GF-2	2019年1月	多光谱4波段, 全色分辨率0.8 m	高分贵州分中心
GF-5	2020年1月	高光谱330波段, 分辨率30 m
GF-6	2020年2月	多光谱4波段, 全色分辨率2 m
DEM	/	分辨率30 m	地理空间数据云

Table 1. Parameters of data source

View in the Article

	光照区			阴影区			所有区域
	GLMM	SCLSU	DPM	GLMM	SCLSU	DPM	GLMM	SCLSU	DPM
OA/%	86.81	66.53	74.44	78.18	35.91	44.09	84.89	59.68	67.34
Kappa	0.767	0.451	0.553	0.559	0.111	0.061	0.723	0.357	0.433

Table 2. Overall accuracy (OA) and Kappa coefficient of estimated vegetation and bare rock coverage percentage

View in the Article

GLMM_光照区基岩裸露率/%		参考数据						GLMM_光照区植被覆盖度/%		参考数据
GLMM_光照区基岩裸露率/%		0~ 20	20~ 35	35~ 50	50~ 70	70~ 100	PA/%	GLMM_光照区植被覆盖度/%		0~ 20	20~ 35	35~ 50	50~ 70	70~ 100	PA/%
反演数据	0~20	29	0	0	0	0	100.0	反演数据	0~20	36	9	1	0	0	78.3
	20~35	2	4	1	0	0	57.1		20~35	5	36	5	0	1	76.6
	35~50	0	2	6	2	0	60.0		35~50	0	12	31	4	0	66.0
	50~70	0	0	1	16	15	50.0		50~70	0	0	6	34	18	58.6
	70~100	0	0	0	3	240	98.8		70~100	0	0	0	8	193	96.0
	UA/%	93.5	66.7	75.0	76.2	94.1			UA/%	87.8	63.2	72.1	73.9	91.0
FCLSU_光照区基岩裸露率/%		参考数据						FCLSU_光照区植被覆盖度/%		参考数据
FCLSU_光照区基岩裸露率/%		0~ 20	20~ 35	35~ 50	50~ 70	70~ 100	PA/%	FCLSU_光照区植被覆盖度/%		0~ 20	20~ 35	35~ 50	50~ 70	70~ 100	PA/%
反演数据	0~20	11	0	0	0	0	100.0	反演数据	0~20	31	26	5	0	1	49.2
	20~35	12	1	0	1	0	7.1		20~35	4	18	17	2	0	43.9
	35~50	6	4	1	0	0	9.1		35~50	1	8	14	16	5	31.8
	50~70	2	1	4	7	4	38.9		50~70	2	4	6	22	27	36.1
	70~100	0	0	3	13	251	94.0		70~100	3	1	1	6	179	94.2
	UA/%	35.5	16.7	12.5	33.3	98.4			UA/%	75.6	31.6	32.6	47.8	84.4
DPM_光照区基岩裸露率/%		参考数据						DPM_光照区植被覆盖度/%		参考数据
DPM_光照区基岩裸露率/%		0~ 20	20~ 35	35~ 50	50~ 70	70~ 100	PA/%	DPM_光照区植被覆盖度/%		0~ 20	20~ 35	35~ 50	50~ 70	70~ 100	PA/%
反演数据	0~20	16	1	2	2	2	69.6	反演数据	0~20	17	5	0	0	0	77.3
	20~35	3	0	0	0	1	0.0		20~35	24	38	5	1	1	55.1
	35~50	6	2	0	1	6	0.0		35~50	0	14	28	16	5	44.4
	50~70	1	0	0	3	3	42.9		50~70	0	0	10	27	42	34.2
	70~100	5	3	6	15	243	89.3		70~100	0	0	0	2	164	98.8
	UA/%	51.6	0.0	0.0	14.3	95.3			UA/%	41.5	66.7	65.1	58.7	77.4
GLMM_阴影区基岩裸露率/%		参考数据						GLMM_阴影区植被覆盖度/%		参考数据
GLMM_阴影区基岩裸露率/%		0~ 20	20~ 35	35~ 50	50~ 70	70~ 100	PA/%	GLMM_阴影区植被覆盖度/%		0~ 20	20~ 35	35~ 50	50~ 70	70~ 100	PA/%
反演数据	0~20	9	2	1	0	0	75.0	反演数据	0~20	6	4	1	0	0	54.5
	20~35	0	1	0	0	0	100.0		20~35	7	2	1	0	0	20.0
	35~50	1	0	1	1	1	25.0		35~50	1	0	4	0	0	80.0
	50~70	0	0	1	2	8	18.2		50~70	0	0	0	9	8	52.9
	70~100	0	0	0	3	49	94.2		70~100	0	0	0	8	89	91.8
	UA/%	90.0	33.3	33.3	33.3	84.5			UA/%	42.9	33.3	66.7	52.9	91.8
FCLSU_阴影区基岩裸露率/%		参考数据						FCLSU_阴影区植被覆盖度/%		参考数据
FCLSU_阴影区基岩裸露率/%		0~ 20	20~ 35	35~ 50	50~ 70	70~ 100	PA/%	FCLSU_阴影区植被覆盖度/%		0~ 20	20~ 35	35~ 50	50~ 70	70~ 100	PA/%
反演数据	0~20	2	0	0	0	0	100.00	反演数据	0~20	9	6	3	1	1	45.0
	20~35	1	0	1	0	0	0.00		20~35	4	0	1	11	26	0.0
	35~50	0	0	0	0	0	/		35~50	0	0	1	3	39	2.3
	50~70	6	3	1	0	0	0.00		50~70	1	0	1	2	24	7.1
	70~100	1	0	1	6	58	87.88		70~100	0	0	0	0	7	100.0
	UA/%	20.00	0.00	0.00	0.00	100.00			UA/%	64.3	0.0	16.7	11.8	7.2
DPM_阴影区基岩裸露率/%		参考数据						DPM_阴影区植被覆盖度/%		参考数据
DPM_阴影区基岩裸露率/%		0~ 20	20~ 35	35~ 50	50~ 70	70~ 100	PA/%	DPM_阴影区植被覆盖度/%		0~ 20	20~ 35	35~ 50	50~ 70	70~ 100	PA/%
反演数据	0~20	0	0	0	0	1	0.0	反演数据	0~20	2	2	1	0	0	40.0
	20~35	0	0	0	1	1	0.0		20~35	4	0	2	5	2	0.0
	35~50	0	0	1	1	12	7.1		35~50	1	0	2	2	13	11.1
	50~70	5	0	0	4	26	11.4		50~70	0	0	1	2	14	11.8
	70~100	5	3	2	0	18	64.3		70~100	7	4	0	8	68	78.2
	UA/%	0.0	0.0	33.3	66.7	31.0			UA/%	14.3	0.0	33.3	11.8	70.1

Table 3. Confusion matrix of accuracy verification of results in illumination area and shadow area

View in the Article

	GLMM_裸岩	GLMM_植被	FCLSU_裸岩	FCLSU_植被	DPM_裸岩	DPM_植被
相关系数	-0.159	0.045	0	-0.621^**	-0.582^**	0.549^**
p	0.269	0.758	0.998	0	0	0

Table 4. Correlation coefficient between prediction value of each method and cosine value of solar incident angle

Download Citation

Save the article for my favorites

Paper Information