基于遥感影像的郑州市建筑用地信息提取

Extract of Zhengzhou Building Lot Information Based on Remote Sensing Image

以郑州市landsat ETM影像为数据源,进行建筑用地信息提取。首先,提取出归一化植被指数(NDVI)和归一化建筑指数(NDBI)影像,然后分别对所得的指数影像进行二值化,获得二值化图像,再利用叠加分析的方法对两幅指数图像进行逻辑判别,从而提取出建筑用地信息,再进行精度验证。结果表明,利用NDBI和NDVI相结合的方法弥补了单一利用归一化建筑指数的不足,同时人为干扰因素较少,是一种比较客观、准确、快捷的城市建筑用地信息提取方法。

Taking Zhengzhou landsat ETM imagery as data source,the author extracted building lot information.Firstly,extracting the normalized difference vegetation index（NDVI） and normalized construction Index（NDBI） images,and then the resulting index images binarization;image binarization reuse overlay analysis of two Index images logically discriminated,building land to extract the information accuracy verification.The results showed that the combined method NDBI and NDVI to make up for the lack of single using normalized Construction Index,less anthropogenic disturbances,is a more objective,accurate and fast information extraction method of urban building land.