江西农业大学学报：社会科学版
江西農業大學學報：社會科學版
강서농업대학학보：사회과학판
Journal of Jianxi Agricultural University :Social Sciences Edition
2010年
4期
63~69
,共null页
陈黎 徐梦洁 侯为义 林庶民
陳黎 徐夢潔 侯為義 林庶民
진려 서몽길 후위의 림서민
分形特征 空间结构 长江三角洲 城市群
分形特徵 空間結構 長江三角洲 城市群
분형특정 공간결구 장강삼각주 성시군
fractal dimensions; spatial structure; the Yangtze Delta; urban agglomerations
城市群是都市连绵区空间结构演变的基础。城市体系的自相似性,使得城市群的空间分布具有明显的无标度特征,可以通过分形维数加以描述。以长江三角洲16个城市下的74个市辖区和县为研究对象,采用国家基础地理信息系统提供的县级以上境界面状数据,使用ArcG IS软件,通过ArcM ap ArcToolbox中的自带工具和VBA编程实现长三角城市群分形维数的计算,分析城市群空间分布的向心性、均衡性和相关性。结果表明：首先,长江三角洲地区已逐步形成以上海、南京和杭州为中心的多中心城市群,城市的分布密度由中心向外围逐渐递减;其次,长三角城市群属于复杂分形,其空间分布逐渐趋向均衡;第三,长三角地区顺畅的交通网络促进了区域内城市群的空间相互作用,有利于区域整体发展。
城市群是都市連綿區空間結構縯變的基礎。城市體繫的自相似性,使得城市群的空間分佈具有明顯的無標度特徵,可以通過分形維數加以描述。以長江三角洲16箇城市下的74箇市轄區和縣為研究對象,採用國傢基礎地理信息繫統提供的縣級以上境界麵狀數據,使用ArcG IS軟件,通過ArcM ap ArcToolbox中的自帶工具和VBA編程實現長三角城市群分形維數的計算,分析城市群空間分佈的嚮心性、均衡性和相關性。結果錶明：首先,長江三角洲地區已逐步形成以上海、南京和杭州為中心的多中心城市群,城市的分佈密度由中心嚮外圍逐漸遞減;其次,長三角城市群屬于複雜分形,其空間分佈逐漸趨嚮均衡;第三,長三角地區順暢的交通網絡促進瞭區域內城市群的空間相互作用,有利于區域整體髮展。
성시군시도시련면구공간결구연변적기출。성시체계적자상사성,사득성시군적공간분포구유명현적무표도특정,가이통과분형유수가이묘술。이장강삼각주16개성시하적74개시할구화현위연구대상,채용국가기출지리신식계통제공적현급이상경계면상수거,사용ArcG IS연건,통과ArcM ap ArcToolbox중적자대공구화VBA편정실현장삼각성시군분형유수적계산,분석성시군공간분포적향심성、균형성화상관성。결과표명：수선,장강삼각주지구이축보형성이상해、남경화항주위중심적다중심성시군,성시적분포밀도유중심향외위축점체감;기차,장삼각성시군속우복잡분형,기공간분포축점추향균형;제삼,장삼각지구순창적교통망락촉진료구역내성시군적공간상호작용,유리우구역정체발전。
Urban agglomeration provides the framework for the evolution of spatial structure of urban sprawl.The spatial distribution of urban agglomeration is non-scaling due to the self-similarity of urban system,which could be illucidated by fractal dimensions.In this paper the urban agglomerations in the Yangtze Delta consisting of 16 prefecture-level cities,or 74 municipal districts and counties were chosen as the studying area.The software ArcGIS was employed to calculate 3 kinds of fractal dimensions,namely,aggregation dimension,grid dimension and spatial correlation dimension,with basic data downloaded from National Fundamental Geographic Information System（NFGIS）.The aggregation dimension could be used to describe the spatial aggregan of urban agglomeration,the grid dimension to describe spatial equlibrium and the spatial correlation dimension to describe the spatial interaction between urban agglomerations.The results indicate that the urban agglomerations in the Yangtze Delta are of multi-centers with the regional central cities of Shanghai,Nanjing and Hangzhou.The distribution density of municipal districts and counties gradually decreases from the central cities to the periphery.The urban agglomerations in the Yangtze Delta are relatively evenly distributed and their fractal characteristics are complicated.The convenient transportation infrastructure in the Yangtze Delta promotes spatial interaction between urban agglomerations,which is beneficial for regional integrated development.
