摘要
植被覆盖度是用来衡量地表植被状况的重要指标之一.植被覆盖度及其变化也是区域生态环境变化的重要指标.拟基于郑州市1994年7月2日、2002年6月19日、2009年6月29号和2013年6月28日的TM/ETM+遥感影像数据,利用ENVI 5.1软件,分别采用像元二分法和监督分类法,提取郑州市植被覆盖度信息,并对比分析研究期间郑州市植被覆盖度的变化情况.从而得到郑州市植被覆盖度在研究期间的变化趋势.结果表明:郑州市植被覆盖度呈先下降后上升的变化趋势,但区域内分布不平衡;在提取植被覆盖度时,像元二分模型比监督分类法更具有优势.
The vegetation coverage is one of the main indicators to measure vegetation. Vegetation coverage and its change is an important index of regional ecosystem environment change. Based on the TM / ETM ＋ images of Zhengzhou City in June 28,2013,June 29,2009,June 19,2002 and July 2,1994,with ENVI 5. 1 software,the pixel dichotomy principle and supervised classification is gained. And through the comparative analysis of the message of Zhengzhou City＇s vegetation coverage during the study period,the change trend of vegetation coverage in Zhengzhou City is gained. The results show that the vegetation coverage of Zhengzhou has the tendency of decrease first and increase afterwards. But the spatial distribution is unbalanced. Pixel dichotomy has more advantges than supervised classification in gathering vegetation coverage.
出处
《平顶山学院学报》
2015年第5期83-89,共7页
Journal of Pingdingshan University
