Under the United Nations Law of the Sea, coastal states are provided with legal articles that determine the manner in which boundaries and limits in the seas may be drawn. Maritime activity such as mineral exploration, research, mining, laying of cables and pipelines, transit and other operations occurring within these boundaries come under the jurisdiction of the coastal state. At present, there is no central source of information to display and explain the various boundaries. This paper describes the development of a Global Maritime Boundary Database that provides critical information in the planning of maritime activities.