{"id":"2948184c-4f22-42ce-933d-c73b359e30f6","title":"黑河干流中游地区1:25万DEM图（2005-2007）","title_en":"1:250000 DEM map of the middle reaches of Heihe River (2005-2007)","serial":"黑河计划","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：数据以矢量shp格式存储，文件名称“黑河干流中游地区25万地形图.SHP”。\n数据读取：可以用Arcgis、Qgis等遥感软件打开读取。","description":"DEM是数字高程模型的英文简称(Digital Elevation Model)是流域地形、地物识别的重要原始资料。DEM 的原理是将流域划分为m 行n列的四边形(CELL),计算每个四边形的平均高程,然后以二维矩阵的方式存储高程。由于DEM 数据能够反映一定分辨率的局部地形特征,因此通过DEM 可提取大量的地表形态信息,这些信息包含流域网格单元的坡度、坡向以及单元格之间的关系等[7 ]。同时根据一定的算法可以确定地表水流路径、河流网络和流域的边界。因此从DEM 提取流域特征,一个良好的流域结构模式是设计算法的前提和关键。\n  本数据将dem提取为矢量图，以等高线为基础，详细描述了黑河干流中游地区的地形。\n数据范围：\n左：493300.000000 右：669700.000058\n上：4414700.000000下：4254299.999998","doi":"10.11888/Geogra.tpdc.270815","projection":"4326","language":"zh","share_type":"offline","east":104.2,"west":96.1,"south":37.7,"north":43.3,"scale":1,"crs":null,"filesize":5.0,"share_policy":"b","ts_created":"2016-01-04T02:30:25+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-04-24T11:28:07.120823+08:00","time_description":"","datas_group":0,"time_description_en":"","data_format":"EXCEL","project":[10,11,15],"specials":["4e7b97a6-ee1f-4b51-83e5-04a100993973"],"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":[],"subtopics":{"metadata":"2948184c-4f22-42ce-933d-c73b359e30f6","three_pole":null,"third_pole":null},"username":"赵捷","review_time":null,"protected_duration":6,"protected_describe":null,"is_important":false,"hit_count":9925}