Relationships
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AreaGeografica |
A geographic location, generally having definite boundaries. Note that this differs from its immediate superclass Region in that a GeographicArea is a three-dimensional Region of the earth. Accordingly, all astronomical objects other than earth and all one-dimensional and two-dimensional Regions are not classed under GeographicArea.
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Archipelago | An Archipelago is a group of islands. |
| Basin | A Basin is an area of land enclosed or partially enclosed by higher land. |
| Butte | A Butte is an Upland raised sharply from the surrounding region. Smaller in area than a Mesa. |
| Canyon | A Canyon is a narrow valley with steep sides, usually created by erosion. |
| Cape | A Cape is a piece of land projecting into a body of water. |
| CaveMatrix | A CaveMatrix is the framework of earth or rock in which a Cave is embedded. |
| Delta | A Delta is a LandForm composed of silt or other alluvium, deposited at or near the mouth of a river or stream as it enters a body of relatively static water. Typically a delta is flat and fan-shaped. |
| Glacier | A Glacier is a large body of slow-moving ice. Glaciers displace soil and rock while moving over land surfaces and break apart, forming Icebergs, when they reach the sea. |
| Hill | A Hill is a raised part of the earth's surface with sloping sides - an old mountain which because of erosion has become shorter and more rounded. |
| LowlandArea | A LowlandArea is a land area lower than the surrounding region, and usually level land. |
| Mesa | A Mesa is a land formation having a relatively flat top and steep rock walls. |
| Mountain | A Mountain is a high, rocky LandForm, usually with steep sides and a pointed or rounded top, and higher than a Hill. |
| MountainRange | A MountainRange is a row or chain of connected mountains. |
| Peninsula | A Peninsula is a piece of land that extends into a body of water and is surrounded on three sides by water. Typically connected by an Isthmus or neck of land that is narrower than its main portion (contrast with Cape). |
| Plateau | A Plateau is a flat upland area with one steep face, elevated plain. |
| Reef | A Reef is a ridge of rock, coral, or sand at or near the surface of a WaterArea. |
| RiverBank | A RiverBank is the ShoreArea adjacent to a River. |
| Seacoast | A Seacoast is the ShoreArea along the margin of an ocean, extending inland approximately 1-3 km from the low water mark. |
| Shoal | A Shoal is a LandForm near a WaterArea with most of it is covered by a %BodyOfWater. |
| SlopedArea | A SlopedArea is a land surface which lies at an angle to the horizontal so that some points on it are higher than others, a slope. |
| UplandArea | An UplandArea is a LandArea elevated above the surrounding terrain. |
| Valley | A Valley is an area of low-lying land flanked by higher ground. Valleys typically contain a stream or river flowing along the valley floor. |
| Volcano | A Volcano in the broadest sense, i.e., a region containing a vent through which magmous and/or pyroclastic materials are passed from the interior of the Earth to its surface (atmospheric or underwater). |