摘要
在RS与GIS技术支持下,基于2002年上海市5 m分辨率的SPOT遥感影像和上海城市土地利用的景观类型,定量分析了几种常用景观格局指数随尺度的变化规律.结果表明:上海市土地利用景观格局指数对粒度和幅度变化都很敏感,景观格局具有明显的尺度依赖性,不同指数对尺度的响应特征不同;40 m分辨率是上海城市土地利用景观的本征观测尺度,小于这个尺度范围往往表现出随机性特征;24 km的幅度是一个特征操作尺度,与上海市建成区与非建成区边界的范围相吻合,说明对于上海城市景观而言,距离城市中心12 km的幅度可能是一个本征的操作尺度;上海市城市结构的复杂性和城市空间扩展的不对称性,说明上海城市景观格局的本征操作尺度并不是一个规则的形状,24 km的正方形范围仅是一个近似的操作尺度.
Based on geographic information system the landscape classes of urban land use in Shanghai spatial resolution in 2002, and then, the classified change patterns of several basic landscape metrics （GIS） and remote sensing （RS） techniques, City were extracted from SPOT images with 5 m data were applied to quantitatively explore the at different scales. The results indicated that landscape metrics were sensitive to grain- and extent variance. Urban landscape pattern was spatially dependent. In other words, different landscape metrics showed different responses to scale. The resolution of 40 m was an intrinsic observing scale for urban landscape in Shanghai City since landscape metrics showed random characteristics while the grain was less than 40 m. The extent of 24 km was a symbol scale in a series of extents, which was consistent with the boundary between urban buih-up area and suburban area in Shanghai City. As a result, the extent of 12 km away from urban center would be an intrinsic handle scale for urban landscape in Shanghai City. However, due to the complexity of urban structure and asymmetry of urban spatial expansion, the intrinsic handle scale was not regular extent, and the square with size of 24 km was just an approximate intrinsic extent for Shanghai City.
出处
《应用生态学报》
CAS
CSCD
北大核心
2007年第12期2827-2834,共8页
Chinese Journal of Applied Ecology
基金
浙江省教育厅科技项目(2451012004)
中国博士后科学基金项目(20060391039)
上海市城市化生态过程与生态恢复重点实验室开放基金资助项目.
关键词
尺度
景观格局
上海市
scale
landscape pattern
Shanghai City
