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基于《环北极地区多年冻土和地下冰状态图》的中国及其周边地区冻土分布图

字段说明: Num_code(冻土属性编码) Combo(冻土属性) extent(冻土范围) content(含冰量) 属性对照如下: (1)冻土属性对照表: 0 (No information ) 1 - chf (Continuous permafrost extent with high ground ice content and thick overburden) 2 - dhf (Discontinuous permafrost extent with high ground ice content and thick overburden ) 3 - shf (Sporadic permafrost extent with high ground ice content and thick overburden ) 4 - ihf (Isolated patches of...