Characterising Landscape Pattern And Cluster Zoing In Nanxiong City Based On Landscape Index

Landscape ecological zone classification is an important part of landscape ecology. Through establishment of classification systems, not only the spatial variation conditions and organizational relationships of the regional landscape could be reflected, but also reveal the feature of spatial structure and ecological function. Finally, use the result landscape ecological zone classification as a basic of landscape ecological assessment and management for city landscape ecology planning. Traditional classification such as scale analysis, ecological function analysis, remote sensing image interpretation are often used, it's limited by method and influenced by human subjectivity.The Cluster Analysis which based on landscape index is an un-mature method. In this paper, this method is exploring and improving through the units cluster analysis witch based on landscape pattern analysis, mining the unknown information of landscape index at the same time.IKONOS images of Nanxiong city, Guangdong province, are used in this paper. Integration remote sensing analysis, GIS analysis, landscape ecology analysis and cluster analysis, it is included that: firstly, calculated and analyzed the spatial structure feature and formation mechanism at class level and landscape level of Nanxiong, landscape ecological units as well; secondly, Factor Analysis and Cluster Analysis are applied for data compression and cluster witch used landscape index as the variable factors, finally, quantitative analysis and discussion the results; finally, summarizes and analyzes the distribution rule of each region and the structure of landscape ecology pattern, then give some suggestions for the city planning of landscape ecology .The research results showed that: firstly, at class level, cultivated landscape and forestland landscape with high cohesion, well connectivity, low fragmentation, Urban and Rural Construction landscape, water landscape, unused land on the contrary. The structure has shown a significant difference at the landscape level. Secondly, 18 landscape ecological units have been clustered to four regions by cluster analysis witch based on application of the landscape index as variable factor, there are Human disturbance dominated areas, Mountain-basin transition areas, Mountainous landscape dominated areas and Mountain landscape dominated areas. Cluster results reveal the landscape pattern feature well.Cluster analysis by use landscape index witch broken the limitations of landscape ecology method and human interference, has shown applications and perspective in landscape ecology classification.