基于高分辨率遥感影像的城市地表信息提取

Extracting Information of Urban Land Surface with High Resolution Remote Sensing Image

高分辨率遥感影像具有高空间分辨率、高清晰度、信息量丰富等优点,为城市地表土地覆盖和土地利用信息的提取提供了可能。本文以高分辨率遥感影像数据worldview为主要数据源,以基于立体像对提取DEM、基于分类的面向对象影像分析方法和基于阴影的建筑物高度获取为主要技术,自动提取武汉市十里铺区域的地表信息,得到了该区域的DEM、土地分类情况以及建筑物高度情况等信息,精度高,速度快,结果表明利用高分辨率的遥感影像对复杂的城市地表信息获取是可行的。

With the advantages of high spatial resolution and definition, and rich information, land classification and land utilization of urban surface can be reached by using the high-resolution remote sensing data. Based on the high-resolution remote sensing image data worldview as the main data source, the methods of stereo images, object-oriented technique and architecture shadow are used to extract the information of DEM, land classification and building heights in Wuhan Shilipu district. The results show the high precision and rapid speed when extracting the surface information, and high-resolution remote sensing image is feasible for complex urban surface information acquisition.