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以绍兴市作为研究区 ,选取两景不同时相的TM影像 ,进行了城镇扩展的研究。该研究区位于中国东部沿海地区 ,其地理位置和投资环境决定了其城镇的快速发展 ,因此对其进行城镇扩展的研究具有非常重要的意义。本文假定以植被覆盖为明显标志的景观生态和基于NDVI的城镇土地利用之间的相互关系 ,给出了一种新的城镇扩展检测方法 ,即使用NDVI公式生成植被指数 ,然后提取 1984年和 2 0 0 0年归一化差分纹理指数的纹理影像 ,这些指数显示了这些纹理影像变化的比率 ,该方法成功地显示了两景影像间的变化区域。当然为了获取正确的结论往往需要相关的地面数据。研究结果显示 ,在城镇外围地区具有明显的植被覆盖变化
With Shaoxing as the research area, TM images of two scenes with different temporal phases were selected to study the urban expansion. The study area is located in the eastern coastal area of China. Its geographical location and investment environment determine the rapid development of its urban area. Therefore, it is of great significance to study its urban expansion. In this paper, a new method of urban extension detection is proposed based on the relationship between the landscape ecology marked by vegetation cover and land use based on NDVI in urban areas. That is, NDVI is used to generate the vegetation index, and then the vegetation index extracted in 1984 and 2 Texture images of the normalized difference texture indices for the year 0 0 0, which show the ratio of these texture image changes, successfully show the area of variation between the two images. Of course, in order to get the correct conclusion, we usually need relevant ground data. The results show that there are obvious vegetation cover changes in the periphery of the urban area