{"id":"8a64b0f9-88ff-4433-99dd-69391906a7df","title":"中国长江上游 30m CLCD 土地覆盖数据集（1985、1990-2020）","title_en":"30m CLCD land cover data set in the upper reaches of the Yangtze River in China (1985, 1990-2020)","serial":"","user_limit":"为尊重知识产权、保障数据作者的权益、扩展数据中心的服务、评估数据的应用潜力，请数据使用者在使用数据所产生的研究成果中（包括公开发表的论文、论著、数据产品和未公开发表的研究报告、数据产品等成果），明确注明数据来源和数据作者。对于转载（二次或多次发布）的数据，作者还须注明原始数据来源。","instructions":"文件命名：CLCD_v01_年份.tif/CLCD_v01_年份_albert.tif/CLCD_v01_年份_albert_Province.tif（年份为1985、1990-2020）\n数据读取方式：以tif格式存储，可直接通过Arcgis打开和使用","description":"该数据产品是基于三十万景Landsat影像，结合现有产品自动稳定样本和目视解译样本生产获得，共包括9个一级类型，分别是：农田、森林、灌木、草地、水体、冰雪、荒地、不透水面、湿地；处理流程包括生成训练和测试样本、构建特征、检查分类和时空一致性，以及与其他产品准确性进行对比均在在GEE 平台上实施，以免于数据下载和管理；该数据集基于5463个独立参考样本，产品整体精度为79.31% ；CLCD数据集揭示了1985-2019年中国土地覆盖变化的趋势和模式：如不透水面（+148.71%）和地表水（+18.39%）的扩大，耕地（-4.85%）和草地（-3.29%）的减少，森林（+4.34%）的增加。总的来说，我们的结果反映了中国快速的城市化和一系列生态工程，揭示了在气候变化下人类活动对区域地表覆盖的影响","doi":"https://doi.org/10.5194/essd-13-3907-2021","projection":"","language":"zh","share_type":"online","east":112.0,"west":89.0,"south":24.0,"north":36.5,"scale":null,"crs":null,"filesize":5850.0,"share_policy":"a","ts_created":"2022-09-27T21:40:20.747191+08:00","doi_type":"沿用数据已有DOI","ts_updated":"2022-11-08T16:46:16.296621+08:00","time_description":"1985和1990-2020","datas_group":3,"time_description_en":"","data_format":null,"project":[10],"specials":["b4b306da-eab1-47ef-ae5d-be2556298efd"],"cite":null,"review_status":5,"review_invite":[],"review_editor":null,"data_sources":null,"temporal_resolution":"Yearly","spatial_resolution":"10m - 100m","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[],"subtopics":{"metadata":"8a64b0f9-88ff-4433-99dd-69391906a7df","three_pole":null,"third_pole":null},"username":"段丁琪","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":385}