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| SOME QUESTIONS ON THE STUDY OF LAND GRADATION IN CITIES AND TOWNS——With Downtown Xi'an As an Example |
| Liu Yinhan, Liu Yansui, Ren Zhiyuan, Zhang Ning, Zhao Xiaoqing |
| Department of Geography, Shaanxi Teachers University |
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Abstract Land gradation in cities and towns is physical evaluation of land, that is to say, under the specific purpose, according to the economic and natural attributes of Urban land and its status and functions, in urban social economical activities. At the begining we recognized the forms and extent of urban land use, applied certain technical means and technical levils, evaluate the land quantities comprehensively, and graded the urban land classes. Its theoreticul basis is Theory of Location and Theory of Land rents. There are many factors which influence the use values of land, so it is critical how to choose the factors of gradation reasonably. There are three principles for us to choose the factors:firstly, choose the dominant location factors(business service and traffic); secondly, choose the factors which are universal, wide and influential and, thirdly, cooperate the urban planning closely and enphasize the urban characteristics. According to these principles we have organize the experts to inquire twice and decided four big types, seven factors and 26 sub-factors to form the evaluation system of land quantities. Correspoudingly, we have applied comprehensive evalution methods of many factors to study land gradation. Its basic principle is using quantitative method to embody the extent of influence of all kinds of factors with numbers during the land gradation, and then to use certain maths model to compose a comprehensive index and grade the classes of land quantities according to the indexes. We have graded the land of xi 'an central urban region(an area of about 197 km2)to 7 classes. On the basis of this, we have analyzed the business profits of every kind of land class and founded a measure model of differences of benfits and given practical measure test. The test results in discovering the differences of land rents of defferent classes better. This proves that the result of land gradation in Xi'an is scientific, reasonable and practical. It provides an important foundation for the paid uses of urban land and urban development planning.
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1993, Vol. 8 
