Abstract
With the support of RS and GIS technology,this paper aims to analyze spatial distribution characteristics of the landscape patterns of Houma City as a case study.The results show that the landscape index can well reflect the changing characteristics of landscape patterns of each buffer zone in the study area.The method of making the buffer zone to extract samples has certain advantages in the analysis of gradient change on circle landscape patterns in plain cities of northern China.This study has certain significance and theoretical reference value for reasonably guiding urban expansion and reducing local ecological degradation caused by urban expansion.
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