1. A geospatial imaging system comprising: a geospatial data storage device configured to store a geospatial dataset comprising a plurality of geospatial data points; and a processor cooperating with said geospatial data storage device to determine a plurality of segments within the geospatial dataset, each segment comprising a plurality of neighboring geospatial data points within the geospatial dataset sharing a common geometric characteristic from among a plurality of different geometric characteristics, determine border geospatial data points of adjacent segments, compare the border geospatial data points of the adjacent segments to determine bare earth segments having respective heights below those of the border geospatial data points of adjacent segments, and classify geospatial data points within each bare earth segment as bare earth geospatial data points.