{"id":"df66bd87-bf31-47c0-a415-16d5db339137","title":"祁连山地区水体指数产品（1980-2015）","title_en":"Water index in the Qilian Mountain Area (1980-2015)","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":"文件命名约定：数据种类_坐标系_YYYY.shp\t（YYYY：年）\n数据版本号：V1.0\n投影：+proj=longlat +datum=WGS84 +no_defs\n数据格式：shp \n水体：多边形矢量\n使用方法：shp文件格式，Arcgis、ENVI等均可读取和显示","description":"本数据为祁连山地区1980-2015年地表水体（包括液态水、冰川及多年积雪）分布产品。采用经典归一化水体指数法（Normalized Difference Water Index , NDWI）和人工修正的方法提取。原始基础数据为1978-2018年祁连山全境的Landsat系列影像。参考数据为谷歌影像和哨兵2号影像。产品以shp文件格式存储，包含坐标系、水体面积等属性。产品分为8期，时间分辨率为5年，空间分辨率为30米，边界精度在30米（一个像元）左右。该产品直观地反映了祁连山水体在近35年内的分布时序变化，可用于流域水资源定量估计研究。","doi":"10.11888/Geogra.tpdc.270233","projection":"WGS84","language":"zh","share_type":"online","east":107.0,"west":89.0,"south":34.0,"north":45.0,"scale":null,"crs":null,"filesize":343.0,"share_policy":"a","ts_created":"2019-03-25T16:43:27.968261+08:00","doi_type":null,"ts_updated":"2021-04-19T09:30:56.783924+08:00","time_description":"1980-2015","datas_group":3,"time_description_en":null,"data_format":null,"project":[11],"specials":["4e7b97a6-ee1f-4b51-83e5-04a100993973","836a1603-47d0-494e-88c1-96723fd8e0bc","f2a78cde-1c98-4241-94dc-7532eba32b80","f2a78cde-1c98-4241-94dc-7532eba32b80"],"cite":null,"review_status":5,"review_invite":[],"review_editor":{"id":21054,"last_login":"2022-04-10T10:49:12.540341+08:00","username":"tingting","email":"panxd@itpcas.ac.cn","is_active":true,"is_staff":true,"user_name":"潘小多"},"data_sources":"采用经典归一化水体指数法（Normalized Difference Water Index , NDWI）和人工修正的方法从Landsat影像中提取。Landsat影像来源于美国USGS数据发布网站(http://earthexplorer.usgs.gov/)。","temporal_resolution":"1 year < x < 10 year","spatial_resolution":"m","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[6],"subtopics":{"metadata":"df66bd87-bf31-47c0-a415-16d5db339137","three_pole":null,"third_pole":"XDA20100101"},"username":"XDA20100101","review_time":"2019-03-26T04:36:14.639114+08:00","protected_duration":24,"protected_describe":null,"is_important":false,"hit_count":2132}