基于空间可达性的泉州市各县市影响范围划分

Delimitation of Influence Scope of Counties in Quanzhou Based on Spatial Accessibility

借助GIS软件平台,运用栅格成本距离加权算法,综合考虑地形、交通、居民点等因素,计算泉州市8个县市中心的的空间可达性范围,得到各县市中心的影响范围;在影响范围划分的基础上叠加县域行政范围,通过计算"扩展率"将泉州市各县市划分为三种类型:外扩型、保守型、内敛型等;根据泉州各县市中心影响范围与行政范围叠加后的空间关系,计算二者重叠区域面积占行政面积的比例,分析影响到的其他县市的空间范围及面积.

In the study cost raster was calculated by considering the topography, traffic, population factors and based on the cost raster data covering the whole space, spatial accessibility of 8 counties in Quanzhou was calculated using cost weighted distance method, influence scope of 8 county center was achieved. The county influence scope was overlapped with county boundaries, and the ＂growth rate＂ was calculated, the 8 counties were divided into three types, expanding, conservative, introverted. Further more the relationship between influence scope and the county boundaries was revealed, the proportion of the overlap area and the county area was calculated, and the spatial extent and the area of the other counties were analysed.