1. An optical proximity correction system for local correction of an aerial image produced from a mask having transmissive portions and blocking portions collectively defining a target design, comprising: an analyzer to match one or more segments of the target design to one or more typical case segments from a predetermined set of typical case segments; a controller, coupled to the analyzer, for approximating each of the one or more segments of the target design with matching typical case segments from the set of typical case segments to produce an adjusted aerial image.