Based on the operating environment of ARCGIS, a cost weighted distance analysis (in “Spatial Analyst”module of Arcmap) was conducted to analyze the changes of accessibility after the building of Taizhou Changjiang River in Yangzhong. Finally, the influences for the spatio-temporal change of accessibility were explained in detail. The results showed that the methods used in this research were able to evaluate e distribution pattern and rationality of urban resource.%在ARCGIS的操作环境下,在可达性概念和原理等理论基础上,运用既有相对成熟的分析方法--时间成本加权距离法对扬中市泰州过江通道建成前后的可达性进行了分析评价,并得出结论;在此基础上,通过对各等时圈所包括的空间面积.人口规模以及经济总量的统计和分析,从各个时距圈覆盖的总人口数以及所包含的经济总量产生的变化,对扬中市的发展潜力进行分析与评价.
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