Finally, ERDAS Imagine 2010’s Mosaic Express was used to create image mosaics and vectors of image seamlines, using a Nearest Neighbor sampling process (Figure 18). This was done primarily as a matter of convenience for future cartographic applications. After all, given the variable contrast and image quality in the corners (an unavoidable relic of original sub-par print quality), the process of manual digitization requires the use of individual orthophotos, not mosaics.