基于地学信息图谱的矿业城市空间扩展研究——以徐州市为例

以矿业城市徐州市区1979,1989,1999和2009年4期遥感信息图谱数据为基础,借助GIS空间分析技术和相关统计分析方法,从城市建成区面积变化、扩展强度、分维数、重心坐标、紧凑度等方面对徐州市城市扩展的时空变化特征和驱动力进行分析.结果表明:1979-1999年间,徐州市建设用地面积持续增加,分维数有所变化,扩展强度逐渐增强,1989年以后城市重心朝东部和东南方向移动,城市紧凑度增加,分形维数逐渐减少,城市空间形态趋于合理.自然地理环境、煤炭资源的开采、政策、经济和人口等因素是城市空间扩展的主要因素.

Research on Urban Spatial Expansion Process of Mining City Based on Geo-information Atlas: Taking Xuzhou City as An Example

The spatial expansion information and the driving forces of mining city Xuzhou City were analyzed with the technology of GIS spatial analysis and statistical analysis from the aspects of area change,growth intensity,fractal index,center coordinates and compact index based on the 1979,1989,1999 and 2009 satellite images.The results showed that in 1979—1999,the urban build-up area and its expansion rate and fractal index in Xuzhou City were increased continuously.The urban gravity shifted to the east and northeast and the compact index were increased while the fractal index were decreased and the urban spatial patterns shows the tendency of reasonable.Natural environmental factors,exploitation of coal resources,economic factors,population growth,traffic infrastructure construction and government policy were the main driving forces of the urban expansion.