福州市土地利用类型分形特征分析

Fractal Character Analysis of Land Use Types in Fuzhou City

利用福州市2009年的TM影像,以RS和GIS为技术手段,获取研究区土地利用类型图。运用分形理论求取不同土地利用类型的分维数,并对不同土地利用类型的分形特征进行分析。结果表明,福州市土地利用类型分维数大小的顺序为:水体>建筑用地>耕地>林地>未利用地。说明了水体和建筑用地的边界特征复杂,斑块破碎化程度大;相反林地和未利用地的边界特征比较规则,斑块破碎化程度小。

Using the TM image in 2009, with the application of RS and GIS techniques, the map of land use types is obtained. Fractal theory is applied to work out the fractal dimensions of different land use types. The results show that the ranking of fractal dimensions is as follow： waters area 〉 construction land 〉 arable land 〉 forest land 〉 unused land. It indicates that the boundaries of water area and construction are complex and their fragmentation level is high. Instead, the boundaries of forest land and unused land are inerratic and their fragmentation level is low.