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1项目研究背景和基本情况自然区划是以自然地理综合体为研究对象,以地域分异学说为基本理论,紧密结合行业特点,采用科学、合理的原则、方法以及分区指标体系,对自然地域分异形成的多级自然区进行区域划分。公路是穿越不同自然
1 Research Background and Basic Situation of the Project Natural zoning is based on the natural geographical complex as the research object. Based on the theory of geographical differentiation, the natural zoning is closely integrated with the characteristics of the industry. Scientific and reasonable principles and methods and the index system of zoning are used to analyze the natural geographical distribution Different formation of multi-level natural area for regional division. Roads are different nature