Acta Prataculturae Sinica ›› 2021, Vol. 30 ›› Issue (9): 15-26.DOI: 10.11686/cyxb2020324
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Jia-li LIU1,2(), Jian-rong FAN1(), Xi-yu ZHANG1, Chao YANG1,2, Fu-bao XU1,2, Xiao-xue ZHANG3, Bo LIANG3
Received:
2020-07-07
Revised:
2020-11-02
Online:
2021-08-30
Published:
2021-08-30
Contact:
Jian-rong FAN
Jia-li LIU, Jian-rong FAN, Xi-yu ZHANG, Chao YANG, Fu-bao XU, Xiao-xue ZHANG, Bo LIANG. Remote sensing estimation of vegetation cover in alpine grassland in the growing and non-growing seasons[J]. Acta Prataculturae Sinica, 2021, 30(9): 15-26.
植被指数 Vegetation index | 计算公式 Calculation formula |
---|---|
RVI | |
NDVI | |
SAVI | |
TSAVI | |
MSAVI | |
NDTI | |
MSACRI | |
DFI | |
STI | |
S-NDTI |
Table 1 Several main vegetation indices for grassland coverage estimation
植被指数 Vegetation index | 计算公式 Calculation formula |
---|---|
RVI | |
NDVI | |
SAVI | |
TSAVI | |
MSAVI | |
NDTI | |
MSACRI | |
DFI | |
STI | |
S-NDTI |
植被指数 Vegetation index | 4月相关系数 April correlation coefficient | 8月相关系数 August correlation coefficient | 适用性 Applicability |
---|---|---|---|
NDVI | 0.73** | 0.88** | 适用于生长季Suitable for growing season |
RVI | 0.77** | 0.85** | |
SAVI | 0.73** | 0.88** | |
TSAVI | 0.73** | 0.88** | |
MSAVI | 0.71** | 0.88** | |
NDTI | 0.92** | 0.80** | 适用于非生长季Suitable for non-growing season |
MSACRI | 0.92** | 0.80** | |
S-NDTI | 0.92** | 0.80** | |
DFI | 0.90** | -0.28 | |
STI | 0.92** | 0.78** |
Table 2 Correlation between grassland coverage and vegetation index
植被指数 Vegetation index | 4月相关系数 April correlation coefficient | 8月相关系数 August correlation coefficient | 适用性 Applicability |
---|---|---|---|
NDVI | 0.73** | 0.88** | 适用于生长季Suitable for growing season |
RVI | 0.77** | 0.85** | |
SAVI | 0.73** | 0.88** | |
TSAVI | 0.73** | 0.88** | |
MSAVI | 0.71** | 0.88** | |
NDTI | 0.92** | 0.80** | 适用于非生长季Suitable for non-growing season |
MSACRI | 0.92** | 0.80** | |
S-NDTI | 0.92** | 0.80** | |
DFI | 0.90** | -0.28 | |
STI | 0.92** | 0.78** |
非生长季/生长季 Non-growing season/growing season | 植被指数 Vegetation index | 平均相对误差 Average relative error (%) | 均方根误差RMSE | R2 |
---|---|---|---|---|
非生长季Non-growing season | MSACRI | 10.18 | 7.78 | 0.81** |
S-NDTI | 10.13 | 9.86 | 0.70** | |
NDTI | 20.09 | 9.47 | 0.72** | |
STI | 29.96 | 9.38 | 0.73** | |
DFI | 44.02 | 9.08 | 0.74** | |
生长季Growing season | NDVI | 9.23 | 8.43 | 0.77** |
TSAVI | 11.20 | 11.73 | 0.55** | |
MSAVI | 13.70 | 11.41 | 0.58** | |
SAVI | 22.64 | 11.96 | 0.54** | |
RVI | 21.96 | 12.05 | 0.53** |
Table 3 The accuracy evaluation of grassland coverage based on dimidiate pixel model
非生长季/生长季 Non-growing season/growing season | 植被指数 Vegetation index | 平均相对误差 Average relative error (%) | 均方根误差RMSE | R2 |
---|---|---|---|---|
非生长季Non-growing season | MSACRI | 10.18 | 7.78 | 0.81** |
S-NDTI | 10.13 | 9.86 | 0.70** | |
NDTI | 20.09 | 9.47 | 0.72** | |
STI | 29.96 | 9.38 | 0.73** | |
DFI | 44.02 | 9.08 | 0.74** | |
生长季Growing season | NDVI | 9.23 | 8.43 | 0.77** |
TSAVI | 11.20 | 11.73 | 0.55** | |
MSAVI | 13.70 | 11.41 | 0.58** | |
SAVI | 22.64 | 11.96 | 0.54** | |
RVI | 21.96 | 12.05 | 0.53** |
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