Journal of Geo-information Science ›› 2023, Vol. 25 ›› Issue (10): 2093-2106.doi: 10.12082/dqxxkx.2023.220691
YIN Xiong1,2,3(), CHEN Bangqian2,3, GU Xiaowei2,3,6, YUN Ting4, WU Zhixiang2,3, CHEN Yue5, LAI Hongyan2,3,6, KOU Weili1,*(
)
Received:
2022-09-14
Revised:
2022-11-26
Online:
2023-10-25
Published:
2023-09-22
Contact:
* KOU Weili, E-mail: Supported by:
YIN Xiong, CHEN Bangqian, GU Xiaowei, YUN Ting, WU Zhixiang, CHEN Yue, LAI Hongyan, KOU Weili. Rapid Monitoring of Tropical Forest Disturbance in Hainan Island Based on GEE Platform and LandTrendr Algorithm[J].Journal of Geo-information Science, 2023, 25(10): 2093-2106.DOI:10.12082/dqxxkx.2023.220691
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Tab.1
Parameters used in LandTrendr
参数 | 参数描述 | 数值 |
---|---|---|
maxSegments | 分割最大单元数目 | 8 |
spikeThreshold | 如果相邻时间点NBR值的差异百分比小于该值,那个该值会被认为是异常值,须剔除 | 0.90 |
vertexCountOvershoot | 在初始阶段的潜在节点回归中可以超过的节点数 | 0 |
preventOneYearRecovery | 是否阻止一年后恢复的情况 | True |
recoveryThreshold | 如果某个分割段的恢复率大于该值的倒数,那么这个分割段将会被移除 | 0.50 |
pvalThreshold | 回归分析中F检验的p值,超过该值的话,则认为该像元没有发生变化 | 0.05 |
bestModelProportion | 简单模型的选择规则,如果超过该值,则被选中 | 0.75 |
minObservationsNeeded | 拟合中需要的最少观测数 | 5 |
Magnitude | 发生扰动时植被指数掉落的振幅 | ≥0.17 |
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