以遥感影像为数据源,借助GIS的空间叠加分析技术和多要素综合分析功能,提取1985、1990、1995、2000、2005、2010、2014年7个时期绵阳市建成区的扩展信息,并结合绵阳市经济社会数据,从扩展数量、扩展形态、扩展合理性、扩展空间差异4个方面对绵阳市城市建成区扩展情况进行分析;选取自然因素、经济和产业结构因素等方面指标,分析绵阳城市扩展的驱动力.结果表明,1985 ～2014年绵阳市建成区面积增加了126.27 km2,1985～1995年以中心区为中心呈外延式多方向扩展,1995～2010年呈多方向廊道式扩展,2010～2014年以内部结构调整为主;经济发展和人口增长是绵阳市城市扩展的决定因素.研究结果可为政府提供科学的决策依据,为绵阳市今后的城市规划和生态保护提供指导.%With remote sensing image as the data sources,the expansion information of built-up area in Mianyang City was extracted in seven periods by GIS spatial overlay analysis technology and multi-factor comprehensive analysis function.Combining with the economic and social data in Mianyang City,the expansion situation of built-up area in Mianyang City was analyzed from the aspects of expansion quantity,expan sion form,expansion rationality,and expansion space.With natural factor,economic and industrial structure and other factors as the indexes,driving force for the urban expansion of Mianyang City was analyzed.Results showed that the built-up area in Mianyang City increased by 126.27 km2 from 1985 to 2014.With the central area as the center,Mianyang City showed multi-direction extensive expansion in 1985-1995,multi-direction gallery expansion in 1995-2010,and mainly internal structure adjustment in 2010-2014.Both economic development and population were the determinants of urban expansion in Mianyang City.This research provides decision basis for the government,and offer guidance for the urban planning and ecological protection in Mianyang City in future.
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