The National Spatial Development Suitability Evaluation And Countermeasures Study At Count Level

National land is the material base and the space carrier of all production and life.China has a large population and less land resources per capita.For Karst area,the per capita land resources can be less.The continuous development of social economy is the trend of the future.To develop it is necessary to build;to build it is necessary to land development.The formation of land resources will continue to increase rigid demand.Therefore,it is imperative to carry out the rational development of land space,optimize the spatial development pattern,and promote the rational and efficient use of land space.This study starts from the following parts: Firstly,this paper summarizes the current situation of the domestic and international research on the development of land space.Secondly,combination of the land use structure information entropy and Lorenz curve-Gini coefficient method,and use this method to analysis of land use status and spatial distribution from the perspective of time and space.Thirdly,the study combined with the actual research and literature research.The suitability evaluation index system and evaluation model of national spatial development are constructed from 3 levels of target layer,criterion layer and element layer.Target layer is the suitability of national spatial development.The criteria layer includes 3 dimensions of development constraints,the current level of development and future development potential.Element level includes 22 specific indicators.The index weight was determined by Coefficient of variation method.According to the weighted summation method,the development intensity of land space development,the current level of development,the future development potential and the suitability index of national space development.Based on the GIS platform,the suitability of land development in the study area is divided into 3 grades from high to low.Finally,the study according to the three-dimensional cube principle.The study area is divided into 3 areas: the leading area of urban construction,the leading area of agricultural development and the ecological development zone.According to the actual situation of the study area,the author puts forward the Countermeasures of national space development.