isolated the soft spot to a particular location and side of the compactor 12 this information may be sent from the mapping system 64 to a display 66 the display 66 may be mounted in the cab 16 and may be visible to an operator the information can be displayed visually in conjunction with locational images in conjunction with moving images or overlaid on a map accessibility to this information may allow an operator to quickly identify or avoid soft spots transmission of this information to the mapping network 68 fig4 may allow a contractor or supervisor to institute a soft spot repair procedure in a timely manner the mapping network 68 may include information from other displays information for other vehicles or compactors centralized information hubs and means for informational communication therebetween the mapping network 68 could allow other vehicles or compactors to avoid a soft spot or communicate a soft spot location to repair crews the mapping network 68 may also allow storage of the information away from the mapping system 64 for redundancy and security the information could also be sent to a centralized information hub to convey the ground condition of a particular site a method of using wheel slip to help identify and locate soft spots is also disclosed the method may include providing a compactor 12 wherein the compactor may have a first side 20 including a first wheel 22 and a second side 26 including a second wheel 28 the method may further include detecting a rotational speed of the first wheel 22 and generating first wheel rotational speed data and detecting a rotational speed of the second wheel 28 and generating second.