1. A geospatial modeling system comprising: a geospatial model data storage device; and a processor cooperating with said geospatial model data storage device and configured to determine a void within a geospatial model data set defining a void boundary region, the geospatial model data set being generated based upon a single raw data capture, select at least one raw fill patch region from within the geospatial model data set for filling the void, the at least one raw fill patch region being from the same single raw data capture in which the void is present, adjust elevation values of the at least one raw fill patch region based upon elevation differences between corresponding portions of the void boundary region and the at least one raw fill patch region, and update the geospatial model data set based upon the adjusted elevation values of the at least one raw fill patch region so that the void is filled entirely based upon raw fill data from within the same single raw data capture in which the void is present.