{"id":"e2055aba-5f04-4f25-b836-1486b0d7f0f7","title":"祁连山区域基于 Landsat 反射率数据的月度30m×30m 地表净初生产力数据（1986-2017）","title_en":"Landsat-based continuous monthly 30m×30m Land Surface NPP dataset in Qilian mountain area (1986-2017)","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：NPP_YYYYMM-N.tif\t（YYYY：年，MM：月，N：分幅编号）\n数据版本号：V1.0\n投影：+proj=longlat +datum=WGS84 +no_defs\n数据格式：GeoTIFF \n单位：无\n缩放因子：0.001\n有效值范围：0- 30000\n填充值：0","description":"本数据集包括祁连山区域1986、1990、1995、2000、2005、2010、2015和2017年月度合成30m×30m地表NPP产品。采用最大值合成 (Max value composition, MVC) 方法，利用 Landsat5, Landsat8和sentinel 2红光和近红外两个通道的反射率数据，实现对地表月度NDVI产品的合成，进而计算NPP。\n数据通过Google Earth Engine云平台对反射率进行月度合成，通过模型计算指数，对于缺失像素进行插补，质量较好。","doi":"10.11888/Geogra.tpdc.270132","projection":"WGS84","language":"zh","share_type":"online","east":107.0,"west":89.0,"south":34.0,"north":45.0,"scale":null,"crs":null,"filesize":190464.0,"share_policy":"a","ts_created":"2019-06-18T08:46:30.334344+08:00","doi_type":null,"ts_updated":"2021-04-20T00:45:06.464177+08:00","time_description":"","datas_group":3,"time_description_en":null,"data_format":null,"project":[11],"specials":["f2a78cde-1c98-4241-94dc-7532eba32b80"],"cite":null,"review_status":5,"review_invite":[{"user_name":"张扬建","username":"naqu3228","email":"zhangyj@igsnrr.ac.cn","is_cancel_expert":true}],"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":"该数据集是利用Landsat 和sentinel 2 红和近红外波段反射率数据基于最大值合成 (Max value composition, MVC) 方法合成。算法中用到的数据分别来自：\nLandsat地表反射率数据：美国地质调查局USGS（http://www.usgs.gov/）；","temporal_resolution":"Monthly","spatial_resolution":"m","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[6],"subtopics":{"metadata":"e2055aba-5f04-4f25-b836-1486b0d7f0f7","three_pole":null,"third_pole":"XDA20100101"},"username":"吴金华","review_time":"2019-06-20T03:09:55.225550+08:00","protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":2461}