基于GIS的城市土地利用与景观格局优化研究--以湛江市为例

以湛江市主要建成区为研究对象，以湛江市2000年的遥感影像为信息源，通过Geoimager4．0对图片进行处理后，利用GIS的图像、数据处理功能，获取景观要素图斑，得出图斑的数量、面积、周长等特征，计算景观空间格局的异质性指数。结果表明，居住景观和工业景观的斑块面积比例较大，分别为29．57％和15．423％，绿地景观和水域景观的比例偏小，分别为14．501％和5．98％；居住景观的斑块数和多样性指数最大，绿地景观的破碎度最小。通过对景观空间格局指数的分析，探讨了湛江市城市景观生态空间格局，提出了城市景观生态优化的对策和措施。

A Study on Optimizing the Urban Land Use and Landscape Pattern Based on GIS--Taking Zhanjiang City as Illustration

Based on the sources of Remote Sensing (RS) images of Zhanjiang City in 2000, and by using the function of dealing with images and data of Geographic Information System (GIS), this paper produces the patches of landscape types and presents such characteristics of the patches as quantities,perimeters,and areas etc. Then, the present situation,temporal and spatial patterns of urban landscape ecology were elaborated by calculating and analyzing the landscape indexes.Results showed that the area proportiond of habitat landscape,industrial landscape, green-land landscape and waters landscape were 29.57%, 15.423%, 14.501% and 5.98% in 2000,respectively.Also the number of patches and diversity indexes of habitatlandscape were the highest,while the fragmentation indexes of green-land landscape were the lowest in all landscape types. Finally, this paper puts forward the countermeasures to optimize the spatial pattern of urban landscape ecology .