1. A method for generating a visual display based upon point data of a ground based target, the method comprising: storing in a memory a plurality of known object design models in a form of respective three-dimensional voxel arrays; selecting and positioning, using a processor coupled to the memory, a known object design model onto the point data of the ground based target based upon distances between the point data of the ground based target and the corresponding three-dimensional voxel array for the known object design model; auto cropping the point data of the ground based target based upon a ground based vertical threshold; and generating, using the processor, the visual display representative of the distances between the point data of the ground based target and the corresponding three-dimensional voxel array for the known object design model.