{"id":"44ddd191-4123-427d-8170-de435fab01f8","title":"Daily 5-km Gap-free AVHRR snow cover extent product over China (1981-2019)","title_en":"Daily 5-km Gap-free AVHRR snow cover extent product over China (1981-2019)","serial":"","user_limit":"To respect the intellectual property rights, protect the rights of data authors, expand services of the data center, and evaluate the application potential of data, data users should clearly indicate the source of the data and the author of the data in the research results generated by using the data (including published papers, articles, data products, and unpublished research reports, data products and other results). For re-posting (second or multiple releases) data, the author must also indicate the source of the original data.","instructions":"The data is stored in HDF format;\nThe file name is: NIEER_ GF AVHRR SCE_ YYMMDD_ DAILY_ 5km_ V01, where YY represents the year, mm represents the month and DD represents the date;\nReading mode: any software supporting HDF format reading, such as HDF explorer, envi, ArcGIS, etc","description":"Based on AVHRR-CDR SR products, a daily cloud-free snow cover extent dataset with a spatial resolution of 5 km from 1981 to 2019 was prepared by using decision tree classification method. Each HDF4 file contains 18 data elements, including data value, data start date, longitude and latitude, etc. At the same time, to quickly preview the snow distribution, the daily file contains the snow area thumbnail, which is stored in JPG format. This data set will be continuously supplemented and improved according to the real-time satellite remote sensing data and algorithm update (up to may 2019), and will be fully open and shared.","doi":"10.11888/Snow.tpdc.271381","projection":"","language":"en","share_type":"online","east":72.0,"west":142.0,"south":16.0,"north":56.0,"scale":null,"crs":null,"filesize":753.0,"share_policy":"a","ts_created":"2021-06-04T18:26:14.656423+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-11-16T11:43:08.219300+08:00","time_description":"","datas_group":3,"time_description_en":"","data_format":null,"project":[10,11],"specials":[],"cite":null,"review_status":5,"review_invite":[],"review_editor":{"id":21057,"last_login":"2022-04-02T11:43:37.753860+08:00","username":"gecm","email":"gechm@lzb.ac.cn","is_active":true,"is_staff":true,"user_name":"盖春梅"},"data_sources":null,"temporal_resolution":"Daily","spatial_resolution":"0.01º - 0.05º","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[548,551,552],"subtopics":{"metadata":"44ddd191-4123-427d-8170-de435fab01f8","three_pole":null,"third_pole":null},"username":"盖春梅","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":936}