基于Kriging方法和GIS技术的地价时空格局研究

为了研究城市内部地价变化的区域规律,以及引起局部地价上涨的原因,采用剔除二阶趋势的普通Kriging方法,结合GIS技术进行栅格运算,对北京市1998-2005年间的土地交易价格数据进行了时空分布格局的研究。研究发现:北京市地价分布与环线具有很好的耦合关系,市中心辐射影响明显,尚没有形成独立的次级中心;城市内部地价增长的主要原因为功能中心的辐射影响,城市规划和升值预期的影响以及基础设施改造和交通条件的改善;在北京市郊区化过程中,地价变化表现出先外围大幅增长后内部大幅增长的规律,表现出资源约束下的城市土地利用模式。

Spatial and Temporal Patterns of Land Values Based on Kriging and GIS Method

In order to know how and why the land values changed inside the city,the land-value patterns of Beijing during the period from 1998 to 2005 were studied based on Kriging and GIS Method.The land-value data of Beijing had a second order trend,so the Ordinary Kriging(OK) method was used after removing the trend surface.The results showed that there was a positive relationship between land-value and ring roads.The patterns of land values were clearly affected by the eradiating function of the city centre,and there was no independent sub-centre formed.In addition to the impact of city center,the main reasons for the land value increase were the influence of city planning,the expected appreciation,and improvement of infrastructure and transportation.In the process of suburbanization of Beijing,the land values showed a significant growth pattern from the near suburban to the city centre,which caused by the restraint of land resources.