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基于不同时相的高分辨率遥感影像,采用面向对象的解译方法提取了武汉市2000、2005、2010和2014年的土地覆被信息,从城市扩展强度指数,城市中心坐标迁移和分形维数等方面分析了武汉市2000~2014年城市扩展时空特征。结果表明:2000~2014年间,武汉市城市扩展强度指数为1.41,各主城区城市扩展强度不一,洪山区建设用地的增加对主城区城市扩展的贡献最大;在扩展过程中,武汉市城市分形维数增加,城市空间形态变复杂;其扩展呈现核心-放射扩展模式,并逐渐转向圈层式;自然条件、经济、人口、交通、政策和城市规划是武汉市城市扩展的主要驱动力,但随着交通的发展,自然条件和经济对武汉市城市扩展的驱动作用正逐渐减弱。
Based on high-resolution remote sensing images with different temporal phases, the object-oriented interpretation method was used to extract the land cover information of Wuhan in 2000, 2005, 2010 and 2014 from the urban expansion intensity index, urban center coordinate migration and fractal dimension And other aspects of the city of Wuhan from 2000 to 2014 space-time characteristics of expansion. The results show that the intensity of urban expansion in Wuhan is 1.41 between 2000 and 2014, and the intensity of urban expansion in different urban districts is different. The increase of construction land in Hongshan District has the greatest contribution to the urban expansion in the main urban area. During the expansion process, The dimensionality of the urban space is complicated. The expansion shows the core-radiation expansion mode and gradually turns to the stratosphere. Natural conditions, economy, population, transportation, policy and urban planning are the main driving forces for the urban expansion in Wuhan. However, With the development of transportation, the driving effect of natural conditions and economy on the urban expansion in Wuhan is gradually weakened.