A computer implemented method of controlling a mobile work machine , the method comprising: obtaining a representation of a portion of a worksite divided into control zones , each control zone corresponding to a control parameter value for a control parameter of a work machine actuator (WMA) on the mobile work machine ; identifying a position of the mobile work machine in a current control zone on the worksite; controlling the WMA based on the control parameter value corresponding to the current control zone ; wherein controlling the WMA based on the control parameter value comprises identifying the current control zone in which the mobile work machine is operating; accessing a first parameter record corresponding to the current control zone and the WMA; and identifying, in the first parameter record, the control parameter value; detecting initiation of a parameter value modification operation; detecting modification of the control parameter value from a first value to a second value; and controlling the WMA based on the second value for the control parameter; characterized by modifying the representation to include a finished control zone corresponding to a portion of the current control zone that was already operated on by the mobile work machine and that corresponds to the first value of the control parameter, and an unfinished current control zone corresponding to a portion of the current control zone that has not been processed by the mobile work machine and that corresponds to the second value of the control parameter; by modifying the first parameter record to correspond to the finished control zone , and by generating a second parameter record, corresponding to the unfinished current control zone , including the second value for the control parameter value. obtaining a representation of a portion of a worksite divided into control zones , each control zone corresponding to a control parameter value for a control parameter of a work machine actuator (WMA) on the mobile work machine ; identifying a position of the mobile work machine in a current control zone on the worksite; controlling the WMA based on the control parameter value corresponding to the current control zone ; wherein controlling the WMA based on the control parameter value comprises identifying the current control zone in which the mobile work machine is operating; accessing a first parameter record corresponding to the current control zone and the WMA; and identifying, in the first parameter record, the control parameter value; detecting initiation of a parameter value modification operation; detecting modification of the control parameter value from a first value to a second value; and controlling the WMA based on the second value for the control parameter; characterized by modifying the representation to include a finished control zone corresponding to a portion of the current control zone that was already operated on by the mobile work machine and that corresponds to the first value of the control parameter, and an unfinished current control zone corresponding to a portion of the current control zone that has not been processed by the mobile work machine and that corresponds to the second value of the control parameter; by modifying the first parameter record to correspond to the finished control zone , and by generating a second parameter record, corresponding to the unfinished current control zone , including the second value for the control parameter value. <EOS>