{"id":"e493adb3-b0a2-4333-9fb5-b5d4f3eec220","title":"黑河生态水文遥感试验：黑河流域积雪面积比例数据集","title_en":"HiWATER：Dataset of fractional snow cover area in the Heihe River Basin","serial":"HiWATER","user_limit":"本数据由“黑河生态水文遥感试验（HiWATER）”产生，用户在使用数据时请在正文中明确声明数据的来源，并在参考文献部分引用本元数据提供的引用方式。","instructions":"","description":"黑河流域积雪面积比例数据集提供了2010到2012年无云日积雪面积比例时间序列产品，该数据利用卫星MODIS数据，具有较高时间分辨率（1天）和空间分辨率（500m）。首先利用自动算法N-FINDR选择端元，在自动提取的基础上，利用人工方法选择了积雪、植被、云、土壤、岩石和水6种类型端元，并根据2009年影像建立了光谱数据库；在光谱数据库的基础上利用全约束线性解混方法（FCLS）进行亚像元分解获取初级积雪面积比例产品；最后利用差值去云的算法获取了MODIS逐日积雪面积比例无云产品。经利用高分辨率影像Landsat TM验证，相比已有MODIS积雪面积比例产品 (MOD10A1)，具有更高的精度。能够为流域水文，气象提供更准确的积雪参数输入。\n数据说明：0-100积雪面积比例，0非雪；\n投影类型：经纬度投影，WGS-84基准面；\n空间分辨率：0.005度；\n时间分辨率：1天。","doi":"10.3972/hiwater.218.2014.db","projection":"4326","language":"zh","share_type":"online","east":101.8,"west":97.8,"south":37.3,"north":42.1,"scale":null,"crs":null,"filesize":1003.52,"share_policy":"a","ts_created":"2017-08-24T06:02:13+08:00","doi_type":null,"ts_updated":"2021-04-19T22:35:02.976979+08:00","time_description":"","datas_group":3,"time_description_en":null,"data_format":"ENVI标准格式 (BIL)","project":[10,11,15],"specials":["ee3dfdf5-2e9f-4b61-a301-4fb49e30e3c2","f9d830ca-e958-4f67-8590-a26a37cfba0a","45a2b294-7cd9-4dc6-bc41-6435a6a717da","4e7b97a6-ee1f-4b51-83e5-04a100993973"],"cite":null,"review_status":5,"review_invite":[],"review_editor":null,"data_sources":null,"temporal_resolution":null,"spatial_resolution":null,"license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[47],"subtopics":{"metadata":"e493adb3-b0a2-4333-9fb5-b5d4f3eec220","three_pole":null,"third_pole":null},"username":"胡晓利","review_time":null,"protected_duration":6,"protected_describe":null,"is_important":false,"hit_count":11185}