A system includes a position sensing system for determining a position of a machine and a work implement configured to engage material to form a raised contour. A controller determines a plurality of positions of the machine as the machine moves about the work site and the work implement forms the raised contour, determines a plurality of reference positions along an edge of the raised contour as the work implement forms the raised contour, and generates a map of the edge of the raised contour based upon the plurality of reference positions.