{"id":"d74a90e5-fe76-4b5f-a788-f009ada374da","title":"“一带一路”关键节点区域建成区年际变化过程数据（1985-2018）","title_en":"One belt, one road, key node area,inter-annual change process data of built-up areas (1985-2018)","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":".tif，可以采用ARCGIS、ENVI打开查看","description":"城市建成区的变化反映了城市的发展情况，因此对建成区变化过程的信息提取是研究城市发展和区域经济的重要前提。该数据集包含1985 年至 2018 年关键节点建成区表面积的年变化信息，分辨率为 30m。 使用监督分类和时间一致性检查的组合方法，以汉班托塔、仰光和达卡三个关键节点为研究区域，确定从非建成区到建成区的变化。 建成区像素定义为 50% 以上不透水。 发生转变的年份（从非建成区到建成区）可以从像素值中识别，范围从34（年份：1985）到1（年份：2018）。 例如，1990 年的建成区可以显示为像素值大于 29。 在从非建成区到建成区单调转换之后，该数据集在时间上是一致的。","doi":"","projection":"","language":"zh","share_type":"online","east":97.0,"west":81.0,"south":6.0,"north":24.0,"scale":null,"crs":null,"filesize":0.82,"share_policy":"a","ts_created":"2021-12-21T15:37:37.926540+08:00","doi_type":"国际公开共享数据","ts_updated":"2021-12-30T10:56:33.731872+08:00","time_description":"1985-2018","datas_group":3,"time_description_en":"1985-2018","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[{"user_name":"王卷乐","username":"王卷乐","email":"wangjl@igsnrr.ac.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":"Yearly","spatial_resolution":"10m - 100m","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[6],"subtopics":{"metadata":"d74a90e5-fe76-4b5f-a788-f009ada374da","three_pole":null,"third_pole":"XDA20030302"},"username":"XDA20030302","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":66}