Boundaries
The world is full of boundaries but not all look or function the same...
A boundary is an invisible line that marks the extent of a state's territory. Boundaries are learned, accepted and occasionally challenged. But not all boundaries function the same.
Boundaries first begin by DEFINING where the lines will be set. Definition, in political geography, is the written legal description (as in a treaty-like document) of a boundary between two countries or territories.
The Berlin Conference was a conference regulating European colonization and trade in Africa, held in Berlin, Germany in 1884. It began by settling a dispute over the Congo between Belgium, France and Portugal. It resulted in the “Scramble for Africa,” and the subjugation of African nations. The "General Act of the Berlin Conference of West Africa" was the legal definition of which regions European powers had exclusive rights over.

Then boundaries are typically DELIMITED. Delimitation, means the translation of the written terms of a boundary treaty (the definition) into an official cartographic representation.
Delimitation occurs when lines are drawn on the map. This occurs across multiple scales, ranging from municipalities to counties, from electoral districts to States and from countries to supranational organizations.

Finally, some boundaries may be DEMARCATED. Demarcation is the actual placing of a political boundary on the landscape by means of barriers, fences, wall, or other markers.
Demarcated boundaries range from a fence marking the extent of a family's property to a heavily guarded wall separating two countries.

Physical boundaries are defined and delimited (and occasionally demarcated) by a prominent physical feature in the natural landscape—such as a river or the crest ridges of a mountain ridge; also known as a natural boundary.
Example: The Rio Grande separates the United States and Mexico
Geometric boundaries are defined and delimited (and occasionally demarcated) as a straight line or an arc; also known as an artificial boundary.
Example: A line of latitude (49th parallel) serves as a portion of the boundary between the United States & Canada. It is also an example of an antecedent boundary.
Antecedent boundaries are established before the area in question is well populated.
Example: The border between Malaysia and Indonesia was negotiated between English & Dutch settlers before large-scale inhabitation (but disregarding indigenous populations)
A subsequent boundary is established after the area in question has been settled and that reflects the cultural characteristics of the bounded area.
Example: The boundary between China and Vietnam is based on cultural differences. The boundary has changed incrementally over nearly 1000 years; but the border was finalized in 2009, 30 years after a brief war between the two countries.
Consequent boundaries coincide with some cultural divide, such as religion or language; also known as an ethnographic boundary.
Example: Following the end of British colonial rule, the boundaries between India & Pakistan/Bangladesh were drawn based on religious differences. India is predominantly Hindu and Pakistan & Bangladesh are predominantly Muslim.
A superimposed boundary line is placed over and ignores an existing cultural pattern.
Example: The boundaries in Africa negotiated by European powers at the Berlin Conference (right), regardless of language (left) and ethnic (middle) boundaries.
A relic (relict) boundary is a former boundary line that is still discernible and marked by some cultural landscape feature, such as a fence.
Example: The Great Wall of China
Quiz
Write the type of boundary (or boundaries) that each example represents
A. North African boundaries between Egypt, Libya and Sudan
B. Berlin Wall (photo from 2006)
C. Andes Mountains, particularly between Chile & Argentina
D. Boundary between Spain & Portugal
E. Territorial claims in Antarctica
F. Boundary between the Republic of Ireland and Northern Ireland (UK)
G. Boundaries of Iraq & Syria
H. The separation of North & South Vietnam during the Cold War
I. The boundary between Indonesia and Papua New Guinea
J. The boundary between Spain & France
Impact & function of boundaries
Many people think of boundaries as horizontal lines that separate two countries' land, the way we see them on a map. But boundaries are better understood as vertical planes that extend both up into the sky and down into the earth. Disputes have arisen over how those lines are defined, delimited, and function.
Disputes
- Definitional (position)
- Locational (territorial)
- Operational (function)
- Allocational (resource)
Definitional disputes arise when two or more parties disagree over how to interpret the legal language of the boundary agreement.
Example: Chile & Argentina use the crests of the Andes mountains as the boundary but much of the southern land has never been settled or accurately mapped
Locational disputes center on where a boundary SHOULD be. This is a dispute over the delimitation of the boundary on the map. The definition of the boundary is not in dispute, but its interpretation is
Example: The western part of the boundary between Saudi Arabia and Yemen has been disputed for some time. This region is oil-rich and was a frontier region for quite some time. A frontier is an area separating two states in which neither effectively exercises political control. Recently though, Saudi Arabia has been militarizing this section of the border.
Saudi forces along the border with Yemen
Operational disputes occurs when neighboring states differ over the way their border should function.
Example: The European Union allows free movement across borders. When the Syrian refugee crisis began to spill into Europe, operational disputes began. Member states argued over whose responsibility it was to provide asylum to the refugees, while others put up walls & barriers to keep refugees out.
Border between Hungary & Serbia
Allocational disputes arise when natural resources may be used by both countries.
Example: In 1990, Iraq invaded Kuwait because it claimed that the Kuwaitis were drilling oblique boreholes thus breaking the vertical plane and extracting oil from the Iraqi side of the border. The Rumaylah oilfield (northern Kuwait, southern Iraq) was the major issue.
Increasingly, allocational disputes are arising over water resources. The Tigris, Nile, Colorado, and other rivers are at the center of disputes between upstream and downstream users.
The Grand Ethiopian Renaissance Dam has sparked conflict with Egypt over access to the Nile.
United Nations Convention on the Law of the Sea (UNCLOS) is a code of maritime law approved by the United Nations in 1982 that authorizes, among other provisions, territorial waters extending 12 nautical miles (22 km) from shore and 200-nautical-mile-wide (370-km-wide) exclusive economic zones.
Territorial waters is the area of sea around a country’s coast recognized as being under that country’s jurisdiction, set at 12 nautical miles in 1982. This is water that is subject to the complete sovereignty of that country. But other countries have the right of "safe passage."
So a Saudi oil tanker can pass through American territorial waters. The U.S. Coast Guard could stop the tanker to make sure it complying with American environmental laws, but they cannot attack the tanker.
Key point: Countries have sovereignty above & below the water (complete sovereignty) in the territorial waters.
The Exclusive Economic Zone or EEZ is the sea zone over which a state has special rights over the exploration and use of marine resources stretching 200 nautical miles from the coast.
States can have exclusive rights to explore, manage, conserve or exploit the living and non-living resources of the water, seabed, and subsoil.
Key point: Countries have economic sovereignty below the waterline.
While UNCLOS lists 12 nm of territorial waters and 200 nm of EEZ, those are MAXIMUMS. Countries could have less than that.
The median-line principle is part of the UNCLOS that directs countries to meet in the MIDDLE if the bodies of water between them is LESS than the stated maximum distance.
For example, if two countries have 20 nm between them, each country would be entitled to 10 nm of territorial waters.

Border Case Studies

Spratly Islands

Sao Paulo's walled communities

The DMZ

Brazil/Bolivia

European Union

Northern Ireland

Arctic Ocean

The Aegean Sea

Sahrawi Republic

Native American Reservations

India/Bangladesh

Cyprus

West Bank wall

Melilla, Spain
