In the field of control engineering, a map-based controller is a controller whose outputs are based on values derived from a pre-defined lookup table.
[1] The inputs to the controller are usually values taken from one or more sensors and are used to index the output values in the lookup table.
[1] By effectively placing the transfer function as discrete entries within a lookup table, engineers are free to modify smaller sections or update the whole list of entries as required.
[1]