上海市城市绿地景观的信息图谱

以2003年上海市航空影像为基本数据源，选择了斑块大小、分维数、破碎度、多样性、均匀度、优势度等景观指数，从绿地斑块、绿地景观类型、景观镶嵌三个层次上分析了上海市城市绿地景观格局．主要得出以下结论：（1）上海市大面积城市绿地景观以公园和生产绿地为主，街道绿地、单位附属绿地和居住区绿地是绿化景观中最小的单元；（2）公园、生产绿地、街道绿地景观斑块的分维数较大，斑块的几何形状不规则，说明外界对它们的干扰比较少，而防护绿地、单位附属绿地、居住区绿地的分维数较小；（3）多样性指数最大值出现在市中心，绿化景观的功能性更强一些；最小值出现在郊区，城市绿地比例很小、斑块类型单一；均匀度指数最大的位于普陀区、松江区、徐汇区，最低的在郊区；静安区、卢湾区、杨浦区这3个老城区人口密度大。旧城改造频繁，绿地斑块破碎度指数最大．

The research on the urban green land by using aerial image data

There are six types of green land in Shanghai such as park green land,industry green land,residential green land, street green land,green land for shield and green lands near some buildings.By using the 2003a's aerial image data of Shanghai city,the paper analyzed its patterns of green lands at three levels-patch shapes,green land types and mosaics of different green lands.According to the differences of different green lands in patch size,fractal index,fragmentation index,evenness in- dex,diversity index and predominance in the area,three results were got.1) The average size of patches in park and industry green lands are much larger than that in other types 2) The fractal dimensions of park,industry,street green lands are higher than that of other types,and their shapes are more irregular than the other types',showing they were lees disturbed.3) The maxi- mum of diversity index of green lands appears at urban center and the minimum is in the suburb.The maximum of evenness index is in Putuo,Songjiang and Xuhui,and the lowest is in the suburb.The maximum of fragmentation index is in Jin'an,Luwan and Yangpu.