1. A method of combining data to arrive at a composite graphical representation of a construction site comprising, the steps of: providing subsurface mapping data; creating a subsurface model of subsurface features from the subsurface mapping data; creating a wire frame model of an above surface feature; overlaying the wire frame model with a pictorial representation of the above surface feature; and combining the wire frame model with the subsurface model to produce the composite graphical representation.