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Zoning which is to divide the study area into different zones according to their geographical differences at the global, national orregional level, includes natural division, economic division, geographical zoning of departments, comprehensive zoning and so on.Zoning is of important practical significance, for example, knowing regional differences and characteristics, regional research andregional development planning, understanding the favorable and unfavorable conditions of the regional development etc.Geographical environment is arising from the geographical position linkages. Geographical environment unit division is also a typeof zoning. The geographical environment indicators are deeply studied and summed up in the article, including the background, theassociated and the potential. The background indicators are divided into four categories, such as the socio-economic, the political andmilitary, the strategic resources and the ecological environment, which can be divided into more sub-indexes. While the sub-indexescan be integrated to comprehensive index system by weighted stacking method. The Jenks natural breaks classification method, alsocalled the Jenks optimization method, is a data classification method designed to determine the best arrangement of values intodifferent classes. This is done by seeking to minimize each class’s average deviation from the class mean, while maximizing eachclass’s deviation from the means of the other groups. In this paper, the experiment of Chinese surrounding geographical environmentunit division has been done based on the natural breaks (jenks) method, the geographical environment index system and the weightedstacking method, taking South Asia as an example. The result indicates that natural breaks (jenks) method is of good adaptability andhigh accuracy on the geographical environment unit division.  The geographical environment research was originated in thegeopolitics and flourished in the geo-economics. The mainrepresentatives of the geopolitics are German geographerFriedrich Ratzel, British geographer Mackinder and Americangeographical politician Nicholas John Spykman etc. The mainrepresentative of the geo-economics is American geographicaleconomist Edward Luttwak. China has the most neighboringcountries in the world, and its geographical environment isextremely complex. With the continuous development ofglobalization, China's relations with neighboring countries havebecome more complex and more closely. So it is verymeaningful to have depth research on geographical environmentunit division of China

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

Research on Geographical Environment Unit Division Based on the Method of Natural Breaks (Jenks)