1. A system-implemented method determining a minimum bounding polygon for use in a geo-coding system, the method comprising: receiving, by a processor, a first polygon defining a first geographic region; receiving, by a processor, a second polygon defining a second geographic region; receiving, by a processor, an accuracy specification specifying a desired accuracy for determining other geographic regions one of adjacent to, proximate to, overlapping with, within or encompassed by the first geographic region defined by the first polygon and the second geographic region defined by the second polygon; and determining, by a processor, a minimal number points corresponding to the first and second polygons to define a third polygon at least bounding the first and second polygon, wherein the number of points determined is based on the accuracy specification.