1. A method comprising: extracting a plurality of ground points from a data set captured by ground-based laser detection and ranging (LiDAR) to construct a digital elevation model, wherein each ground point includes positional information including an altitude; identifying one or more road structures that are altitudinally offset from surrounding terrain based upon the plurality of ground points; and modifying the ground points of the digital elevation model that are representative of the one or more road structures that are altitudinally offset from the surrounding terrain, wherein modifying the ground points comprising mitigating or eliminating altitudinal offset of the ground points of the digital elevation model that are representative of the one or more road structures that were identified to be altitudinally offset from the surrounding terrain so as to be more consistent with the surrounding terrain as opposed to the one or more road structures that were identified to be altitudinally offset from the surrounding terrain.