{"id":"1d237e32-f87f-4ecc-87d3-91c4fe728b34","title":"中亚，南亚和中南半岛土地覆被变化（1992-2020）","title_en":"Land cover change in Central Asia, South Asia and Indochina Peninsula（1992-2020）","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":"土地覆盖数据：地区+年份","description":"此数据包含1992年-2020年时间段的中亚，南亚和中南半岛地区的空间分辨率为300m土地覆盖数据，包含10个一级类别，由原数据的二级类别合并而来。数据基于欧空局的1992年-2020年时间段地表覆盖产品 CCI-LC，对耕地、建设用地和水体等地类进行修正。基于清华大学全球土地覆被数据（FROM-GLC，30m栅格）、美国NASA的MODIS全球土地覆被数据（MCD12Q1，500m栅格）、美国地质调查局USGS的全球耕地数据（GFSAD30，30m）、日本全球林地数据的（PALSAR/PALSAR-2，25m）的一致区获取训练样本，应用谷歌地球数字引擎及其随机森林算法，对研究区待修正区域进行机器判别，获得修正的土地覆被产品。应用2019年和2020年的谷歌地球高清影像，对耕地、建设用地和水体变化区域的精度进行分层随机抽样验证，三种地类分别抽取了1200个、共计3600个，相比 CCI-LC数据，本修正产品在该变化区域的精度提升了11%到26%。","doi":"10.11888/RemoteSen.tpdc.271861","projection":"WGS84","language":"zh","share_type":"online","east":119.3,"west":46.5,"south":0.8,"north":55.4,"scale":null,"crs":null,"filesize":382.61,"share_policy":"a","ts_created":"2021-11-30T14:00:41.896026+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-12-19T17:18:59.109560+08:00","time_description":"","datas_group":3,"time_description_en":"","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":71190,"last_login":"2021-12-07T16:18:04.719644+08:00","username":"枫瑜","email":"81883470@qq.com","is_active":true,"is_staff":false,"user_name":"陈珺"},"data_sources":null,"temporal_resolution":"Yearly","spatial_resolution":"100m - 1km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[6],"subtopics":{"metadata":"1d237e32-f87f-4ecc-87d3-91c4fe728b34","three_pole":null,"third_pole":"XDA20040201"},"username":"XDA20040201","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":427}