如何使用ADS40等线阵推扫式相机直接获取城市地区的真正射影像，在计算结果时，不需要地面的高程信息，仅仅需要两条有重复地区的影像数据即可。-Such as how to use the ADS40 pushbroom linear array camera directly to obtain the true orthophoto in urban areas, in the calculation of results, not the ground elevation information, just need to have two areas of image data can be repeated.