STUDY ON THE SPATIAL PATTERN OF URBANIZATION——ACASE OF LANZHOU-XINING AREA
利用不平衡指数和空间统计方法，研究了兰西地区31个城市的城市化空间格局，发现其呈Y形轴带分布，城市化水平由中心向外围递减，且极化趋势增强。
Using the imbalance index,Getis-Ord General G and Getis-Ord Gi index,and using arcgis9.2 technology,study on the urbanization pattern,from quantitative measurement and the qualitative analysis,of the Lanzhou-Xining area’s 31 cities.The paper make a conclusion that: ①Lanzhou-Xining area’s urban system is reversing Ding type scale grade structure,not a pyramid type.②LanZhou-XiNing area urbanization space pattern is the Y form.It takes the Xining-Lanzhou-Longxi railroad and JinTai-Baiyin-Lanzhou railroad as centre axis.The urbanization level reduces from the centre to outer-ring,Xining、Lanzhou、Baiyin are the poles of axis.③In regional development,polarization nature strengthens the core the past few years city,to gross domestic product,the urbanization imbalance index enhances,and the Getis-Ord General G and Getis-Ord Gi index reduces,urbanization hot spot is located in north.④The urbanization spatial trend is north and west higher than south and east.