{"id":"af9169bc-3fd7-4488-9a12-89bec4f61e4b","title":"长江上游及全国 CGIAR SRTM V4 90米数字高程模型（DEM）数据","title_en":"CGIAR SRTM V4 90m Digital Elevation Model (DEM) data in the upper reaches of the Yangtze River and China","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":"本数据集中的各数据按5度*5度的经纬差分幅后的行号和列号进行组织。行号从西经180往东每5度划分，列号从北纬60度往南每5度划分。各幅的数据采用如下方式命名：如srtm_58_07.tif”。其中，srtm为数据集名称；58为列号，表示数据范围介于东经105-110度之间；07为行号，表示数据范围介于北纬25-30度之间；tif为数据格式。用户可以根据研究区域的地理范围计算需要下载数据的图幅。","description":"该数据是国际农业磋商组织(CGIAR)对USGS/NASA的SRTM数据进行处理后所得的成果，比原数据具有更高的质量，更新于2018年11月。数据按5度*5度的经纬差进行分幅组织，每个数据行列数都是6000，每个像元的大小为0.00083333333*0.00083333333（十进制度），在赤道附近约为90米。数据的空间参考采用WGS84椭球地理坐标系统。数据覆盖的范围不仅包括长江上游地区，还扩展到全国。","doi":"","projection":"WGS84","language":"zh","share_type":"online","east":140.0,"west":70.0,"south":15.0,"north":55.0,"scale":null,"crs":null,"filesize":2020.0,"share_policy":"a","ts_created":"2022-10-28T11:39:54.841359+08:00","doi_type":"国际公开共享数据","ts_updated":"2022-11-08T16:46:16.194615+08:00","time_description":"2018年","datas_group":3,"time_description_en":"2018","data_format":null,"project":[10],"specials":["b4b306da-eab1-47ef-ae5d-be2556298efd"],"cite":null,"review_status":5,"review_invite":[],"review_editor":null,"data_sources":null,"temporal_resolution":"--","spatial_resolution":"10m - 100m","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[],"subtopics":{"metadata":"af9169bc-3fd7-4488-9a12-89bec4f61e4b","three_pole":null,"third_pole":null},"username":"田永中","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":961}