{"id":"f17c1bae-a78c-426b-9c94-ab2a2d67bf8d","title":"“一江两河”耕地空间分布格局数据集（1730）","title_en":"Cropland spatial dataset of Brahmaputra River and Its Two Tributaries in 1730","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":"垦殖率数据以栅格形式储存，文件名称为YJLH1730KZL，YJLH代表一江两河，1730代表年份，KZL代表垦殖率。数据读取方式：可以采用ARCGIS打开查看和分析.","description":"青藏高原海拔高、气候寒冷，自然条件恶劣，生态环境极其脆弱，是全球气候变化的脆弱区和启动区，对青藏高原历史时期的土地开垦研究既是参与全球环境变化的具体途径，也能为土地利用变化的综合研究提供丰富的区域性信息，对于我国乃至全球的历史土地利用/土地覆被变化研究有着重要意义。“一江两河”是青藏高原农牧交错带典型农业区之一，也是西藏近 300 年来土地开垦活动最剧烈和人口增长最快的区域，充分挖掘该地区丰富的历史文献资料重建该地区过去300 年的耕地分布格局，对研究全球气候变化背景下的人类土地利用活动有重要意义。1730年耕地数据主要来源于《铁虎清册》。将资料中记载的土地面积换算成现代亩制单位，某几个缺失的县用该地区的人均耕地数量和人口数量计算得到。","doi":"10.11888/HumanNat.tpdc.272004","projection":"","language":"zh","share_type":"online","east":92.35,"west":87.0,"south":28.2,"north":31.2,"scale":6000000,"crs":null,"filesize":0.38,"share_policy":"a","ts_created":"2021-12-14T12:58:16.166653+08:00","doi_type":"拥有自主知识产权","ts_updated":"2022-02-11T21:52:55.078714+08:00","time_description":"1730年","datas_group":3,"time_description_en":"1730","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[{"user_name":"黄庆旭","username":"黄庆旭","email":"qxhuang@bnu.edu.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":"--","spatial_resolution":"100m - 1km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[21],"subtopics":{"metadata":"f17c1bae-a78c-426b-9c94-ab2a2d67bf8d","three_pole":null,"third_pole":null},"username":"刘林山","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":109}