1. A geospatial modeling system comprising: a geospatial model data storage device containing a geospatial model data set representing latitude, longitude, and elevation data; and a processor cooperating with said geospatial model data storage device and configured to identify a plurality of localized error regions within the geospatial model data set and calculate respective localized mean square error (MSE) values associated with each localized error region, calculate an overall MSE value for the geospatial model data set based upon the plurality of localized error regions, prioritize the localized error regions from highest to lowest localized MSE values and iteratively inpaint the localized error region having the highest localized MSE value until the localized MSE value is below an error threshold, re-calculate the overall MSE value, and stop inpainting when the re-calculated overall MSE value is below the error threshold and, if the re-calculated overall MSE value is not below the error threshold, then iteratively inpaint the localized error region with the next highest localized MSE value.