1. A surface mapping system comprising: a sensor on each of a plurality of machines located on a worksite; a display for providing a visual depiction of a surface of the worksite; a controller configured to receive position data comprising a plurality of discrete points from the sensors on each of the plurality of machines; remove outlying points from the plurality of discrete points; generate visual depiction information of a surface of the worksite from non-outlying points; and transmit the visual depiction information to the display.