摘要
利用DMSP/OLS夜间灯光数据可以有效的研究区域尺度的城市化空间过程。通过利用1997、2002、2007和2012年的灯光数据,并计算灯光阈值,提取珠三角城市群的空间信息;经分析获取城市群地区点状、线状与面状的城市化空间模式,并研究了城市重心的转移情况;最后探讨了不同年份不同城市的用地主导类型。研究表明:珠三角城市群表现出面状、线状与点状的扩张模式;在研究时段内,城市重心基本维持在113.63°E、22.82°N左右,移动幅度不大;1997—2007年,珠三角城市群中除惠州市,其余城市均表现为外延主导型扩展;2007—2012年,各城市均表现为填充增强主导型。
DMSP / OLS night light data can be used to study urbanization process over regional scale. Based on DMSP/OLS data in 1997, 2002, 2007 and 2012, together with other statistical data, thresh- old value, and spatial information of the Pearl River Delta city group were extracted and calculated. Three spatial modes of urbanization were found and the change of center of gravity was analyzed. Dur- ing the study period, the polygon, the linear and the point spatial modes were exhibited. The focus re- mained around 113.63°E and 22.82°N, moving little. Except Huizhou, all cities in Pearl River Delta City Group exhibited the extension dominant type from 1997 to 2007, and all cities exhibited to the fill- ing dominant type from 2007 to 2012.
出处
《亚热带资源与环境学报》
2015年第2期71-76,共6页
Journal of Subtropical Resources and Environment
基金
科技部传统村落保护规划与技术传承关键技术研究项目(2014BAL06B00)
