{"id":"944b42e1-07c3-4e42-81fd-dd9199ac4d6b","title":"青藏高原Landsat系列卫星遥感归一化差值水分（NDMI）产品（1980s-2019）","title_en":"Landsat normalized difference moisture 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：NDMI是以景为单位存放文件夹，由NDMI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-NDMI，如L5-TM-115-026-19840418-LSR-BRDF-NDMI；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-NDMI.TIF，如L5-TM-115-026-19840418-LSR-BRDF-NDMI.TIF。数据使用方法：NDMI结果可使用Arcgis、ENVI、QGIS等软件打开，为了降低存储空间，NDMI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NDMI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NDMI的计算公式进行生产的，即利用近红外与短波红外之间的差异来定量化反映植被冠层的水分含量情况；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：NDMI与冠层水分含量高度相关，可以用来估计植被水分含量，而且NDMI与地表温度之间存在较强的相关性，因此也常用于分析地表温度的变化情况。","doi":"10.11888/Ecolo.tpdc.271724","projection":"UTM","language":"zh","share_type":"protected","east":106.7,"west":73.4,"south":24.6,"north":40.4,"scale":null,"crs":null,"filesize":6354370.56,"share_policy":"a","ts_created":"2021-06-21T16:41:45.075373+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-09-27T15:18:30.673003+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":"944b42e1-07c3-4e42-81fd-dd9199ac4d6b","three_pole":null,"third_pole":"2019QZKK0300"},"username":"孔令桥","review_time":null,"protected_duration":24,"protected_describe":null,"is_important":false,"hit_count":431}