{"id":"1b128d7a-ccf6-4930-99b8-1ec23c8f4160","title":"非洲萨赫勒地区30m土地利用/覆盖数据集（1990-2020）","title_en":"30m land use and cover maps for the Sahel Region in Africa (1990-2020)","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":"文件命名：数据以Geotiff格式储存，文件名称为“Sahel30_LC_yyyy.tif”，其中yyyy代表年。\n数据读取方式：可读取geotiff的软件或计算机语言均可读取该数据，如ArcGIS、ENVI、IDL、Python、Matlab等。","description":"本数据集为非洲萨赫勒地区1990-2020年每5年1期的30m土地利用/覆盖分类产品。该产品基于一套集合机器学习和多元数据融合的土地覆盖分类协同框架，利用谷歌地球引擎 (GEE) 云计算平台，将监督土地覆盖分类和现有多个主题土地覆盖图融合生产而成。分类体系采用FROM_GLC分类体系，包括耕地、森林、草地、灌丛、湿地、水体、不透水面和裸地共8大类。该数据集经过大量萨赫勒区域全季节样本验证，数据集整体准确率在75%左右，变化区域检测的准确率在70%以上，也与粮农组织和现有的土地覆盖图有很好的相似性。该数据集可为非洲萨赫勒地区土地资源可持续利用和环境保护等提供数据支撑。","doi":"10.11888/Terre.tpdc.272021","projection":"WGS84","language":"zh","share_type":"online","east":55.0,"west":-20.0,"south":0.0,"north":30.45,"scale":null,"crs":null,"filesize":8673.28,"share_policy":"a","ts_created":"2022-02-17T22:21:21.301083+08:00","doi_type":"拥有自主知识产权","ts_updated":"2022-02-18T12:25:15.514418+08:00","time_description":"1990-2020","datas_group":3,"time_description_en":"1990-2020","data_format":null,"project":[11],"specials":["826da9bc-541f-469f-ade3-a16e04d375ca"],"cite":null,"review_status":5,"review_invite":[],"review_editor":null,"data_sources":null,"temporal_resolution":"Yearly","spatial_resolution":"10m - 100m","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[797],"subtopics":{"metadata":"1b128d7a-ccf6-4930-99b8-1ec23c8f4160","three_pole":null,"third_pole":null},"username":"蒋敏","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":2317}