{"id":"9056beca-74c5-4660-baf4-76b85f4332ab","title":"黄河上游流域边界图（2012）","title_en":"Watershed boundary of the Yellow River upstream (2012)","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":"数据以矢量shp格式存储，可用Arcgis、Qgis等遥感软件打开","description":"一、概述\n黄河是我国第二长河，黄河泥沙问题引起全世界人民的关注。流域是重要的自然单元，以SRTM-DEM与ASTER-GEDEM数据集为数据源，在ArcGIS软件平台下，利用河道烧录法与河道标量法相结合的方法，对黄河上游流域边界进行了提取，获得自黄河源区至河口镇整个黄河上游的流域边界。\n二、数据处理说明\n以美国发布的SRTM-DEM与ASTER-GDEM为数据源，在ArcGIS软件平台下，利用河道烧录法与河道标量法相结合的方法，对黄河上游流域边界进行了提取。由于三湖河口至河口镇河流比降极小，因此该段流域边界存在一定误差。\n三、数据内容说明\n该图以ArcGIS,.shp文件存储，流域边界横跨青海、四川、甘肃、宁夏、内蒙五个省（自治区），总面积达55.06 × 104 km2。\n四、数据使用说明\n流域边界是水文、土壤侵蚀及非点源污染研究的重要自然单元，通过流域边界的提取，可以划定土壤侵蚀及非点源污染的迁移范围。","doi":"","projection":null,"language":"zh","share_type":"online","east":112.0,"west":95.0,"south":37.0,"north":42.0,"scale":null,"crs":null,"filesize":2.37,"share_policy":"a","ts_created":"2015-05-20T09:27:30+08:00","doi_type":"国际公开共享数据","ts_updated":"2021-04-19T20:49:08.091377+08:00","time_description":"","datas_group":3,"time_description_en":"","data_format":"shp","project":[10,11],"specials":[],"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":[107],"subtopics":{"metadata":"9056beca-74c5-4660-baf4-76b85f4332ab","three_pole":null,"third_pole":null},"username":"盖春梅","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":8661}