城市居住单元绿地景观遥感环境研究

城市是人类改造最彻底的景观,城市中的居住单元是与市民最息息相关的景观单元。绿地是居住单元的重要自然要素,在调节气候、改善环境质量、吸尘消声等方面起着重要作用,在一定程度上反映了居住单元景观质量的优劣。遥感、地理信息系统与景观生态学理论共同形成了对生态系统空间格局进行研究的独具特色的研究模式,而利用景观指数对空间格局进行定量化研究是这种研究模式的基本内容。传统的景观指数研究多基于TM、SPOT影像在较大尺度上开展,基于高分辨率遥感影像在居住单元这样的小尺度上研究景观格局还较少。本文具体介绍了利用高分辨率遥感影像提取居住单元绿地景观斑块的整个过程,并选取绿地覆盖率、斑块密度、分维数、均匀度指数和最大斑块指数等指数,分析了厦门居住单元的绿地景观结构,最后采用模糊评判的方法对选取的居住单元作综合评价。

Research on green land landscape comprehensive assessment of the city living unit

City Landscape is mainly changed by human activities.Living Unit is very important for citizens.Green land,as an important natural element,has a significant effect on climate and environment.So we can use green land to describe the living unit. Much information can be retrieved from Remote Sensing.Geographical Information System can help manage and analyze data of large amount.RS,GIS together with landscape ecology theories make up a new research pattern,whose essential content is quantitative research.Now the source data for landscape indices is mostly TM and SPOT image.Limit to image's resolution,the research is focused on large scale and is still rare on small scale with high-resolution image.This paper introduces the process to assess the living unit landscape with high-resolution image.Patch Density,Fractal dimension,Evenness Index and Largest Patch Index to analyze green land structure of Xiamen city,and finally are used comprehensive assessment using fuzzy mathematics is given.