Remote Sensing Technology and Application, Volume. 39, Issue 1, 248(2024)
Identification of Typical Grassland Degradation Indicator Species based on UAV Hyperspectral Remote Sensing
Figures & Tables(15)
Fig. 2. UAV and hyperspectral remote sensing image acquisition systems
Fig. 3. Vegetation photos of the study area and ground data collection site photos
Fig. 4. Comparison of the original spectral curve and the spectral curve after smoothing noise reduction
Fig. 8. Spectral characteristic curves and standard deviations of training samples
Fig. 10. Support Vector Machines and Random Forest classification results
Table 1. Classification and index of grassland degradation degree
View tableView in ArticleTable 1. Classification and index of grassland degradation degree
必须监测项目 草原退化程度分级 未退化 轻度退化 中度退化 重度退化 植物群落特征 总覆盖度相对百分数的减少率/%
草层高度相对百分比的降低率/%
0~10
0~10
11~20
11~20
21~30
21~50
>30
>50
群落植物结构 优势种牧草综合算术优势度相对百分数的增加率/%
可食草种个种数相对百分数的减少率/%
不可食草与毒害草个体数相对百分数的增加率/%
0~10
0~10
0~10
11~20
11~20
11~20
21~40
21~40
21~40
>40
>40
>40
指示植物 草地退化指示植物种个数相对百分数的增加率/%
草地沙化指示植物种个体数相对百分数的增加率/%
草地盐渍化指示植物种个体数相对百分数的增加率/%
0~10
0~10
0~10
11~20
11~20
11~20
21~30
21~30
21~30
>30
>30
>30
Table 2. Confusion matrix result statistics table of Support Vector Machine
View tableView in ArticleTable 2. Confusion matrix result statistics table of Support Vector Machine
类型 冷蒿 裸土 其他绿色植被 总和 总体精度 Kappa 冷蒿 405 5 7 417 0.97 0 裸土 6 368 0 374 0.98 0 其他绿色植被 19 0 391 410 0.95 0 总和 430 373 398 1 201 0 0 总体精度 0.94 0.99 0.98 0 0.97 0 Kappa 0 0 0 0 0 0.95
Table 3. Statistical table of confusion matrix results for Random Forest
View tableView in ArticleTable 3. Statistical table of confusion matrix results for Random Forest
类型 冷蒿 裸土 其他绿色植被 总和 总体精度 Kappa 冷蒿 409 6 5 420 0.97 0 裸土 5 367 0 372 0.99 0 其他绿色植被 16 0 393 409 0.96 0 总和 430 373 398 1 201 0 0 总体精度 0.95 0.98 0.99 0 0.97 0 Kappa 0 0 0 0 0 0.96
Table 4. Pixel statistics table
View tableView in ArticleTable 4. Pixel statistics table
类型 像元数 研究区总像元 百分比 冷蒿 36 088 646 63 522 353 56.8% 裸土 2 335 576 63 522 353 3.7% 其他绿色植被 25 098 131 63 522 353 39.5%
Table 5. Landscape pattern index statistical table
View tableView in ArticleTable 5. Landscape pattern index statistical table
SPLIT AI 支持向量机 3.645 3 95.071 3 随机森林 3.729 4 87.957 7
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Nile WU, Yulong BAO, Rentuya BU, Buxinbayaer TU, Saixiyalatu TAO, Yuhai BAO, Eerdemutu JIN. Identification of Typical Grassland Degradation Indicator Species based on UAV Hyperspectral Remote Sensing[J]. Remote Sensing Technology and Application, 2024, 39(1): 248
Paper Information
Category: Research Articles
Received: Aug. 29, 2022
Accepted: --
Published Online: Jul. 22, 2024
The Author Email: WU Nile (Bwunile@163.com)
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