{"id":"ee15fa94-5ebb-4192-8d43-c95cb8375f69","title":"中国1:400万冰雪冻土图（1988）","title_en":"Map of snow, ice, and frozen ground in China (1988)","serial":"冰冻圈","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":"数据以栅格tiff格式存储，可用Arcgis等相关软件打开查看。","description":"该图是施雅风先生和米德生编制的《中国1:400万冰雪冻土图》，地图编制的工作地图为《中华人民共和国汉语拼音版》，保留了地图的水系及山脉注记，并增加了一些山文注记。编绘冻土图的依据是：冻土调查和勘探的实际资料、遥感资料的判译、影响冻土形成和分布的气温条件及地形特征。冰川雪线高度以等值线表示其变化趋势。季节性积雪与季节性结冰是综合依据了全国1600个气象观测台站资料和多年考察结果以等值线加注记和符号表示、冷生（冰缘）现象选择具有代表性且经实地观察到的给予示意性的表示。多年冻土和非多年冻土范围界线，依据考察现场资料经计算而编制成图，其综合程度较高（特普费尔著，1982）\n《中国冰雪冻土图》反映了冰川、积雪、冻土及冰缘分布的规模、类型、特征，以及在科学研究上的价值和生产实践中利用、防治的前景。表现了我们三十年来在冰川冻土科研方面的成果。","doi":"10.3972/westdc.020.2013.db","projection":null,"language":"zh","share_type":"online","east":135.5,"west":73.2,"south":17.8,"north":53.9,"scale":null,"crs":null,"filesize":390.0,"share_policy":"a","ts_created":"2013-06-10T00:07:57+08:00","doi_type":"","ts_updated":"2021-04-20T00:32:10.358397+08:00","time_description":"","datas_group":3,"time_description_en":"","data_format":"矢量","project":[10,11],"specials":[],"cite":null,"review_status":5,"review_invite":[],"review_editor":null,"data_sources":null,"temporal_resolution":"Yearly","spatial_resolution":"100m - 1km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[],"subtopics":{"metadata":"ee15fa94-5ebb-4192-8d43-c95cb8375f69","three_pole":null,"third_pole":null},"username":"盖春梅","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":9159}