{"id":"97fb6fc4-7c30-43ab-b686-659a37c60f31","title":"青藏高原Landsat系列卫星遥感归一化差值水体（NDWI）产品（1980s-2019）","title_en":"Landsat normalized difference water index (NDWI) products over the Tibetan Plateau (1980s-2019)","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：NDWI是以景为单位存放文件夹，由NDWI波段、质量文件（Quality Assessment, QA）、元数据、缩略图组成，文件夹的命名规则为：卫星-传感器-path-row-成像日期-LSR-BRDF-NDWI，如L5-TM-115-026-19840418-LSR-BRDF-NDWI；其中NDWI产品是以GeoTIFF格式存储的，命名规则为：卫星-传感器-path-row-成像日期-LSR-BRDF-NDWI.TIF，如L5-TM-115-026-19840418-LSR-BRDF-NDWI.TIF。数据使用方法：NDWI结果可使用Arcgis、ENVI、QGIS等软件打开，为了降低存储空间，NDWI结果由原本的0~1范围内的浮点型均乘以10000变成16位整型，所以使用时需要将结果乘以0.0001，背景填充值为-9999，并进行了“LZW”的无损压缩。","description":"1）数据内容：本数据集包含从1980s-2019年青藏高原地区Landsat长时序NDWI产品。2）数据来源及加工方法：主要是在青藏高原Landsat系列卫星地表反射率数据集的基础上，通过NDWI的计算公式进行生产的，即利用绿光波段和近红外波段的差异比值来增强水体信息，并减弱植被、土壤、建筑物等地物的信息；3）数据质量描述：为了标识云、冰雪，并相应生产了质量标识文件（QA）。4) 数据应用成果及前景：该指数便于地表水体信息有效提取，广泛应用于水资源、水文以及林农业等领域。","doi":"10.11888/Ecolo.tpdc.271717","projection":"UTM","language":"zh","share_type":"protected","east":106.7,"west":73.4,"south":24.6,"north":40.4,"scale":null,"crs":null,"filesize":5892997.12,"share_policy":"a","ts_created":"2021-06-21T16:18:47.394786+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-09-27T15:09:37.655169+08:00","time_description":"1980s-2019年","datas_group":0,"time_description_en":"1980s-2019","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[{"user_name":"冯敏","username":"mfeng","email":"mfeng@itpcas.ac.cn","is_cancel_expert":false}],"review_editor":{"id":42421,"last_login":"2022-04-08T15:16:51.670544+08:00","username":"任慧霞","email":"510727846@qq.com","is_active":true,"is_staff":true,"user_name":"任慧霞"},"data_sources":null,"temporal_resolution":"Monthly","spatial_resolution":"10m - 100m","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[21],"subtopics":{"metadata":"97fb6fc4-7c30-43ab-b686-659a37c60f31","three_pole":null,"third_pole":"2019QZKK0300"},"username":"孔令桥","review_time":null,"protected_duration":24,"protected_describe":null,"is_important":false,"hit_count":463}