Identification and classification of land types of alpine wetlands based on spectral coupling
NIE Shiyin1(), LIU Yansong1,2(), LI Huiling1, XUE Kailun1, SHEN Duheng1, HE Boyu2,3
1. College of Earth and Planetary Sciences, Chengdu University of Technology, Chengdu 610059, China 2. Key Laboratory of Earth Exploration and Information Technology of Ministry of Education(Chengdu University of Technology), Chengdu 610059, China 3. Sichuan Sumhope Spatial Technology Co., Ltd, Chengdu 610094, China
Alpine wetlands, a critical part of the natural ecosystem in the Qinghai-Tibet Plateau, serve as extremely significant water conservation and climate regulation areas in China. Accurately extracting land cover information of alpine wetlands is crucial for local ecological security monitoring and protection. This study performed object-oriented classification of the data from the Zoige wetland, including the Zhuhai-1 hyperspectral remote sensing image, Sentinel-2A remote sensing image, and Landsat-8 OLI image, integrated with spectral, textural, and topographic features. The results show that the overall data classification accuracy of the three images exceeded 85 %, with a Kappa coefficient above 68 %. The optimal classification result was observed in the Zhuhai-1 hyperspectral remote sensing image. The three images showed generally consistent data classification results, with marsh wetlands being the dominant land type. They indicated roughly the same distribution of riverine and lacustrine wetlands and slightly varying distributions of alpine grasslands, with minor area differences. Additionally, they displayed minimally different distributions of desertified land and almost the same hydrographic net distribution except for slightly different tributary distributions. This study fully explores the combinations of spectral features favorable for image classification, improving the identification accuracy of remote sensing images and providing technical support for the conservation of alpine wetlands.
聂诗音, 刘严松, 李会玲, 薛凯伦, 沈杜衡, 何博宇. 基于图谱耦合的高寒湿地土地类型识别与分类[J]. 自然资源遥感, 2025, 37(2): 204-211.
NIE Shiyin, LIU Yansong, LI Huiling, XUE Kailun, SHEN Duheng, HE Boyu. Identification and classification of land types of alpine wetlands based on spectral coupling. Remote Sensing for Natural Resources, 2025, 37(2): 204-211.
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