An algorithm for the unambiguous determination of the equidistant boundary line between two (or more) coastlines

This paper deals with the problem of the rigorous determination of a marine boundary line between two or more countries, both from the theoretical and the algorithmic point of view. Through suitable simplifications, also the problem of the determination of the territorial limit is discussed and solved. Both the applications above are surely important from the geomatic and geo-political point of view, also outside the peculiar problems relevant to the marine environment.