1. A tangible computer readable storage medium containing a software program for generating height information for an arbitrary-image point on a rectified image from first and second aerial images having respective first and second sets of rational polynomial coefficients (RPCs), the first aerial image, the second aerial image, and the rectified image including overlapping image locations, the storage medium comprising: computer program code for generating first and second epipolar lines on the first and second aerial images respectively; computer program code for generating first and second RPC lines on the first and second aerial images, respectively; computer program code for intersecting the first epipolar line and the first RPC line to generate a first match point of the arbitrary-image point; intersecting the second epipolar line and the second RPC line to generate a second match point of the arbitrary-image point; and computer program code for performing stereo intersection of the first and second match points to generate height information for the arbitrary-image point.