CAJ | 학술논문

道路网络在城市社会和经济活动中发挥重要作用.它是联系商业中心与需求间的桥梁.道路系统的更新与变化必然会对它们的关联产生影响Voronoi图足划分势力空间的有效工具,基于道路网络分析构建的加权Voronoi图可以模拟城市商业中心功能辐射的实际情形.本文给出了基于道路网络分析的Voronoi图和加权Voronoi图构建方法.通过对各种Voronoi图的比较分析,认为基于网络路径时间分析构建的加权Voronoi面域图在商业中心辐射域模拟中最为有效.将空间相互作用和断裂点理论与网络加权Voronoi面域图相结合.模拟不同交通条件下南京市商业中心辐射域空间格局及其需求覆盖变化,并提取了辐射域的覆盖面积、覆盖人口、最远辐射路径距离和平均辐射路径距离等信息.对商业中心的地铁邻近度与其辐射域的扩张面积进行相关分析.采用域邻接矩阵描述空间划分平衡与不平衡之间的相互转变过程,可分析道路系统变更后商业中心之间空间竞争的变化趋势.分析结果表明商业中心的地铁邻近度与辐射域的扩张具有较大的相关性,快速轨道交通在商业中心空间竞争中发挥关键作用.
도로망락재성시사회화경제활동중발휘중요작용.타시련계상업중심여수구간적교량.도로계통적경신여변화필연회대타문적관련산생영향Voronoi도족화분세력공간적유효공구,기우도로망락분석구건적가권Voronoi도가이모의성시상업중심공능복사적실제정형.본문급출료기우도로망락분석적Voronoi도화가권Voronoi도구건방법.통과대각충Voronoi도적비교분석,인위기우망락로경시간분석구건적가권Voronoi면역도재상업중심복사역모의중최위유효.장공간상호작용화단렬점이론여망락가권Voronoi면역도상결합.모의불동교통조건하남경시상업중심복사역공간격국급기수구복개변화,병제취료복사역적복개면적、복개인구、최원복사로경거리화평균복사로경거리등신식.대상업중심적지철린근도여기복사역적확장면적진행상관분석.채용역린접구진묘술공간화분평형여불평형지간적상호전변과정,가분석도로계통변경후상업중심지간공간경쟁적변화추세.분석결과표명상업중심적지철린근도여복사역적확장구유교대적상관성,쾌속궤도교통재상업중심공간경쟁중발휘관건작용.
Road network system plays an important role in social and economic activities in cities. It is the bridge linking up commercial centers with demands, thus the update and change of road network will certainly affect the relevancy of commercial centers and demands. Voronoi diagram is an effective tool to partition spatial domain of influence, and the weighted Voronoi diagram based on road network analysis can simulate the actual situation of function radiation of commercial centers. This paper proposed an approach to constructing weighted Voronoi diagram based on network analysis. By contrast of different Voronoi diagrams, the weighted Voronoi area diagram based on network path time analysis is affirmed to be most effective to simulate the radiation domain of commercial centers. We integrated spatial interaction theory and breakpoint theory with network weighted Voronoi area diagram, and simulated spatial pattern change of radiation domain and demand coverage change of commercial centers in Nanjing under different traffic conditions. The covering information of radiation domain including area, population, the furthest path distance and average path distance of commercial centers were picked up so as to analyze radiation domain changes, the relativity of expanding area and subway adjacency of commercial centers. In addition, radiation domain adjacent matrix was proposed to express the balance and unbalance status of spatial partition, which can reveal the trend of spatial competition. The results of simulation .experiments and analysis show that there is correlation between expanding area and subway adjacency of commercial centers, and that road network system with fast rail transit plays a key role in spatial competition among the commercial centers.