Consistency analysis of mapping products for wetlands of international importance in China
LIAO Yuanhong1(), BAI Yuqi1,2()
1. Department of Earth System Science, Ministry of Education Ecological Field Station for East Asian Migratory Birds and Their Habitatses, Institute for Global Change Studies, Tsinghua University, Beijing 100084, China 2. Tsinghua Urban Institute, Tsinghua University, Beijing 100084, China
Monitoring wetland changes based on land cover mapping serves as a significant means for supervising contracting parties to the Convention on Wetlands of International Importance Especially as Waterfowl Habitat (also referred to as the Ramsar Convention) in fulfilling their obligations. However, substantial land cover mapping products available show significant differences in spatiotemporal characteristics, classification systems, and quality. This study conducted a consistency analysis of land cover mapping products for 40 wetlands of international importance in China from 2015 to 2019, aiming to provide a reference for selecting wetland mapping products and monitoring wetlands in Ramsar reserves. Using long time-series land cover mapping products CCI_LC, CGLS_LC, and MCD12Q1, this study preprocessed the data in terms of spatial and category consistency. Based on wetland classification areas, it conducted regression analysis and calculated the accuracy and uncertainty indicators of the mapping products. The results indicate that these products exhibited significant inconsistencies in wetland classification areas, with area differences averaging 6 to 10 times. Moreover, their wetland classification results were marked by low accuracy and high uncertainty. For most regions, the user accuracy (UA), producer accuracy (PA), and Kappa coefficient were below 0.1, and the standard deviation exceeded the mean. Overall, the three land cover mapping products fail to support credible monitoring of changes in wetlands of international importance.
廖远鸿, 白玉琪. 中国区域的国际重要湿地制图产品间一致性分析[J]. 自然资源遥感, 2025, 37(6): 41-48.
LIAO Yuanhong, BAI Yuqi. Consistency analysis of mapping products for wetlands of international importance in China. Remote Sensing for Natural Resources, 2025, 37(6): 41-48.
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