The image of municipal power carries with it the accompanying concept of limitations on that power. One of the seemingly most natural of such limitations is that pertaining to territory. If a municipality is an incorporated entity, composed of precisely described physical boundaries, then its operational existence would normally be presumed to take place within those boundaries. The municipality's power to function outside its limits would thus appear not only unnecessary but foreign to the corporate conception. The problem with such neatness, of course, is its unworldliness. The truism is that neither man nor municipality is an island and that physical description does not delimit existence. Whether from desire, necessity, or happenstance, life--individual or corporate--is an encroaching experience. Obviously one's perception of a given episode is apt to be determined according to whether his perspective is that of encroachor or encroachee.
R. Perry Sentell Jr.,
Extraterritorial Power in Georgia Municipal Law
Available at: https://digitalcommons.law.uga.edu/fac_artchop/86