1. A method for creating a ground confidence map of a geographic area, comprising the steps of: creating a ground confidence map of a geographic area, the ground confidence map having a plurality of pixels with each pixel corresponding to a particular geographic location; assigning the pixels in the ground confidence map with pixel values indicative of composite ground confidence scores by: calculating composite ground confidence scores for the pixel values of common geographic regions within the overlapping portions of the source images within a kernel corresponding to the particular geographic location of the pixels; and storing pixel values indicative of a statistical probability that the geographical location represented by the particular pixels represent the ground.