Two scenarios of the difference DEMs were used in the experiment.The first one is the difference between the pre-seismic DEM created from the topographical map and the post-seismic DEM created from the post-seismic stereo images (Fig. 11a), and the second is the difference between the pre-seismic DEM created from preseismic
stereo images and the post-seismic DEM created from the post-seismic stereo images (Fig. 11b).