面向对象分类法提取城市绿地及景观格局分析

Analysing on Object-oriented Classification Used in Extraction Urban Green Scape and Landscape Pattern

基于2014年江阴市卫星影像资料,运用面向对象分类法对中小型城市江苏省江阴市城市绿地信息进行提取,在Arc GIS软件中的Patch Analyst控件的支持下,运用景观生态学的原理与方法,对江阴市市辖街道景观格局进行分析。得出以下结论:(1)绿地景观斑块等级结构分析中,小型绿地景观斑块数量多,分布广,绿地斑块分布不均,结构不尽合理;(2)绿地景观多样性指数不高,破碎度较大,人为干扰较为严重;(3)绿地景观平均分维度处于中等水平,斑块形状较为复杂。

Based on the satellite image data of Jiangyin city in 2014, the urban green scape information in the medium and small city of Jiangyin city,Jiangsu province is extracted by the object -oriented classification. Suppotring by the Patch Analyst in ArcGIS software, using the principle and method of landscape ecology, the landscape pattern of the street in Jiangyin city is analysed. The following conclusions are obtained：（ 1 ）Through analyzing the plaque grade and structure of green landscape, the small green landscapes are more, and they distribute widely. The distribution of green landscape plaque is uneven, the structure is not reasonable. （2）The green landscape presents low diversity indices, and high fragmentation. The artificial damage is seriously. （3）The mean fractional dimension of green landscape is in the medium level, and the plaque shape is complex.