The Delimitation and Change of Cities Space Attractive Scopes in the Pearl River Delta
通过构建城市综合实力评价体系，用因子分析计算珠三角九市1990-2009年的综合实力，再用改进的断裂点模型和加权Voronoi图划分各市空间吸引范围，揭示其分异特征与变化规律。
Delimitating reasonably urban space attractive scope is significant to regional planning and regional development as a whole.By establishing an evaluation index system of the city comprehensive power,this paper uses factor analysis method to calculate the comprehensive power of nine prefecture-level cities of Pearl River Delta in 1990,1996,2000,2005 and 2009,respectively.Then using the city comprehensive power instead of single city size index in breaking point model and taking the square root of each city’s comprehensive power as vertex weight,the theoretic space attractive scopes of nine cities in five years are divided by using improved breaking point model and weighted voronoi diagram based on expanded breaking point theory respectively,and the track of the dividing line among the cities is presented distinctly.According to the division result,the features and change laws of spatial differentiation of the city space attractive scope of Pearl River Delta are revealed.The authors find that the delimitating result approached from weighted voronoi diagram based on expanded breaking point theory is closer to the reality,because it avoids the randomicity and blindness in dividing attractive scope boundaries among the cities.