以现有城镇等级体系与空间影响研究为支撑,以毕节市乡镇为基础单位,基于Voronoi图技术,结合断裂点理论,以乡镇人口为参考属性划分得到以市西办事处为最高级主中心,撒拉溪镇、海子街镇为次级子中心,鸭池镇、朱昌镇等八个乡镇为辅助,共41个乡镇4个等级的毕节市乡镇体系,初步确定乡镇空间影响范围,探讨划分乡镇等级体系以及确定影响范围的方法与技术。 Based on the study of the existing urban hierarchy system and spatial influence, taking Bijie township as the basic unit, based on the Voronoi diagram technique and the fracture point theory, taking the township population as the reference attribute, the city west office is the most advanced main center, Sarah Creek Town and Haizi Street Town as sub-sub-centers, Duck Pool Town and Zhuchang Town as auxiliary, a total of 41 towns and 4 levels of Bijie township and town system, initially determine the scope of township space impact, to explore the division of township Hierarchical hierarchy and methods and techniques to determine the extent of impact.