基于NDVI的长沙市雨花区景观格局研究

Landscape pattern study of vegetation based on normalized in Yuhua district,Changsha city

为了探寻城市景观发展变化规律,利用TM遥感影像数据,采用基于决策树分类的影像处理技术和归一化植被指数方法对长沙市雨花区景观格局变化规律进行研究。研究结果显示:长沙市雨花区2003年到2013年,城区耕地、园林、林地、水域、未利用土地面积均呈减少趋势,减幅最大的是耕地,增量最大的是居民点及工矿用地。十年来大量农业用地转换为建设用地,值得引起城市管理、规划、保护部门的关注。

With the acceleration of Urbanization and the Industrialization, the landscape pattern change has taken place obviously. To explore the changing and developing rule of the urban landscape, this paper applies TM remote sensing image and the processing technology which is based on the classification of decision-making tree and also studies the method of the figure spot testing based on normalized index of vegetation. With this method, it analyzes the landscape pattern in Yu Hua district, Changsha city from 2003 to 2013. The result shows that the urban land, gardens, woodland, water area and land without using have tended to decrease. The biggest decline is the ploughland and the incremental biggest is housing estate, industrial and mining land. A great deal of agricultural land has been turned into construction land since lo years. This should be paid attention by the urban management, planning and protection.