CAJ | 학술논문

以无锡市1991、1996、2001和2005年的Landsat TM/ETM+影像为数据源,采用改进后的波段组合阈值提取法对无锡市城市建成区空间信息进行提取,并参照太湖流域土地利用分类图对提取的信息进行修正;通过影像叠加分析,研究 1991～2005年无锡市城市扩张的空间分布规律,认为无锡市城市总体扩张呈现出不断增加的态势,尤其是2000年以后,城市扩展出现快速发展.同时无锡市城市空间扩张呈现出不均匀性,主要包括集中连片发展和轴向扩展两种典型的扩展模式,而城市扩展方向主要集中在常州-无锡-苏州城市中心线沿线和环太湖方向,其中以东南部和东部扩展最为迅速;结合无锡市 1991～2005年社会经济以及人文数据,分析了人口及经济发展对城市扩张的影响,结果表明:人口的增加和城市的经济发展是影响无锡市城市扩展的两个重要因素.
이무석시1991、1996、2001화2005년적Landsat TM/ETM+영상위수거원,채용개진후적파단조합역치제취법대무석시성시건성구공간신식진행제취,병삼조태호류역토지이용분류도대제취적신식진행수정;통과영상첩가분석,연구 1991～2005년무석시성시확장적공간분포규률,인위무석시성시총체확장정현출불단증가적태세,우기시2000년이후,성시확전출현쾌속발전.동시무석시성시공간확장정현출불균균성,주요포괄집중련편발전화축향확전량충전형적확전모식,이성시확전방향주요집중재상주-무석-소주성시중심선연선화배태호방향,기중이동남부화동부확전최위신속;결합무석시 1991～2005년사회경제이급인문수거,분석료인구급경제발전대성시확장적영향,결과표명:인구적증가화성시적경제발전시영향무석시성시확전적량개중요인소.
Taking the Landsat TM/ETM+images of Wuxi City in 1991,1996,2001 and 2005 as the data source,this paper used the improved band combination threshold extraction to extract the spatial information of urban built-up in Wuxi City.Then the result was corrected referring to the land use classification map in drainage area of Lake Taihu.By overlaying of four classified images,the law of spatial distribution of urban expansion in Wuxi City from 1991 to 2005 were researched.Result indicates that the overall expansion of Wuxi has increased continually since 1991.In particularly,after 2000,urban expansion had a rapid development.At the same time,Wuxi showed an uneven development of spatial expansion.The spatial expansion mainly included two typical expansion modes which were centralized flaky development and axial expansion.The mostly direction of urban expansion in Wuxi was along the centerline of Changzhou-Wuxi-Suzhou and encircle the Lake Taihu.Meanwhile,the speed of expansion in south-east and east was the fastest.Combining with the data of socio-economic and humanities,the impact of urban expansion by population and economic development was analyzed too.The results show that population growth and economic developments are two important factors which impact on the urban expansion of Wuxi City.