Spatial Distribution and Optimization of Rural Residential Land in the Mountainous Area

The purpose of this paper is to review the related literatures of spatial distribution and optimization of rural residential land in the mountainous areas of China,find out the drawbacks and discuss the way of amelioration.Methods employed include literature review and empirical research.The results indicate that 1)overall,the research of spatial distribution is more adequate than layout optimization;technically,the former takes quantitative study as the primary mean which based on GIS technologies,but the latter is mainly focused on qualitative analysis against the background of rural land consolidation and planning;2) GIS spatial analysis and landscape ecology method was effective in characterizing the spatial distribution of rural residential land in Changyang;the environmental factors such as elevation,slope,aspect and rivers,social factors such as roads,rural population and per capita net income,urban distance,rural residential land scale and land planning,as well as the farming factors such as cultivated land area and garden-plot area produced significant effect to the spatial distribution of rural residential land in Changyang;the five ranks of rural residential land was more reasonable for developing,which was divided by searching automatically according to the weight of Voronoi polygons in Changyang.The conclusion is that delimitating the sphere of spatial influence of rural residential land is an efficient quantitative method for layout optimization by the weighted Voronoi diagram.Meanwhile,the weights were decided by the quantitative relationship between rural residential land and environment.