Optimization of City Service Scope Based on Land Traffic Network:A Case Study of Gansu Province
利用GIS分析甘肃省14个地级市与各网格的距离及经济联系，通过线性规划优化城市服务范围，为政府划分城市区域提供技术支持。
Firstly we use GIS software to analyse the distance between 14 prefecture-level cities or states and each grid of Gansu Province by the spatial analysis of vector data.And we calculate the value of economic ties.Then we divide the city service scope.Next we use linear programming optimization technology to optimize the divided city service scope in ArcInfo workstation.In order to identify the best area of city service scope.The results show that the city service scope after optimization change a lot compared with the divided city service scope before optimization and the city administrative divisions before optimization.For example,the greatest change in the service scope is Lanzhou.The smallest change in the service scope is Jiuquan.Other cities’change a little around its administrative center.It provide technical and theoretical support for government departments to make planning of city zone divides.