绿化覆盖面积是评价园林城市绿地质量的基础数据,本文针对城市绿化覆盖面积的概念,在对SPOT5多光谱影像进行光谱分析的基础上,构建了差和比指数和加和指数两模型,两模型作为新的波段,结合植被分区特点参与分类,提取城市绿化覆盖面积。通过精度评价,可以确定该技术能达到较高的精度水平。 The green coverage area is the basic data to evaluate the green space quality of landscape city. In this paper, based on the concept of urban green coverage area, based on the spectral analysis of SPOT5 multispectral image, the two models of difference and ratio index and addition index are constructed, As a new band, the classification of vegetation zones was taken into account and the urban greening area was extracted. Through the accuracy evaluation, we can determine the technology can achieve a higher level of accuracy.