基于遥感的乌鲁木齐市绿地资源信息提取技术研究

The Study of the Extraction Technique of Greenbelt Information in Urumqi Based

城市绿地是城市生态系统中的一个子系统,可以综合调节城市生态环境。本文基于遥感信息,对乌鲁木齐市绿地格局进行研究和探讨,对城市绿地专题信息进行提取。主要通过计算TM影像及各主成分分量和归一化植被指数NDVI的相关系数来进行波段组合,提高遥感影像的目视解译精度和分类精度,然后与其他资料对比研究,可以发现该方法对于城市绿地信息提取能取得较好结果。研究表明乌鲁木齐市城市绿地存在面积较少,分布状况不均匀。

City greenbelt is a sub-ecosystem of the city eco-system.It is the principal nature factor of the city and it can adjust the environment of the city.So it attracts attention and inspecting and controlling the city greenbelt becomes a important subject in city planning.This paper studies the pattern of the greenbelt in Urumchi and discusses the technique of the research by using TM image based on information of the remote sense and using band NDVI and other combined bands,it picks up the thematic information of the greenbelt and probes the measures of getting this information.This paper combines bands by calculating the correlation coefficient of theprincipal components and NDVI,so we can improve the precision of the judging image by eyes and classification,then comparing with other data we can find this way can acquire fine result.The result indicates:there are some problems in greenbelt in Urumchi such as the proportion is less,distributing pattern is illogicality,etc.This paper tables a proposal of the methods in constructing greenbelt in Urumchi.