简述城市的格子状分布

基于城市的等级体系,城市可以分为超大城市、特大城市、大城市、中等城市、小城市和集镇。分形结构是城市体系的特征,同一级别的城市有平行四边形的格子状分布,格子的两个方向与区域的大地构造线的方向一致。分别以中外特大城市和大、中、小城市为例,分析了城市格子状分布特征。认为在一个区域内,除了格子状对称分布,还可能具有更高的对称形式。城市形成与分布的复杂系统,对于城市化和区域发展具有研究意义,应建立相应的数学模型。

Lattice Distribution of Cities

On the basis of the urban system of hierarchy,cities may be divided to megalopolis,metropolis,large-city,middle-city,small-city and town.The fractal structure is characteristic of the urban system in which there is a lattice-distribution of same grad cities.In the parallelogram lattice there are two directions parallel to tectonics lines in the region,respectively.Taking megalopolis and small,medium,large cities as an example,this paper analyzes the city distribution of lattice.It regards that in a region,in addition to the symmetry of lattice,there may also be a higher symmetric form.The city distribution and complexity system have an important significance for the regional development and urbanization,and the mathematical model should be established accordingly.