Simple Browser : Welcome guest : log in
Home |  Graph |  ]  KB:  Language:   

Formal Language: 

Sigma KEE - LandForm
KB Term: 
A LandForm is the class of geographically and/or geologically distinct areas that occur on Earth's surface, including mountains, hills, plains, valleys, deltas, and features of submerged land areas such as the ocean floor.
Parents GeographicArea 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.
Children ArchipelagoAn Archipelago is a group of islands.
 BasinA Basin is an area of land enclosed or partially enclosed by higher land.
 ButteA Butte is an Upland raised sharply from the surrounding region. Smaller in area than a Mesa.
 CanyonA Canyon is a narrow valley with steep sides, usually created by erosion.
 CapeA Cape is a piece of land projecting into a body of water.
 CaveMatrixA CaveMatrix is the framework of earth or rock in which a Cave is embedded.
 DeltaA 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.
 GlacierA 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.
 HillA 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.
 LowlandAreaA LowlandArea is a land area lower than the surrounding region, and usually level land.
 MesaA Mesa is a land formation having a relatively flat top and steep rock walls.
 MountainA Mountain is a high, rocky LandForm, usually with steep sides and a pointed or rounded top, and higher than a Hill.
 MountainRangeA MountainRange is a row or chain of connected mountains.
 PeninsulaA 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).
 PlateauA Plateau is a flat upland area with one steep face, elevated plain.
 ReefA Reef is a ridge of rock, coral, or sand at or near the surface of a WaterArea.
 RiverBankA RiverBank is the ShoreArea adjacent to a River.
 SeacoastA Seacoast is the ShoreArea along the margin of an ocean, extending inland approximately 1-3 km from the low water mark.
 ShoalA Shoal is a LandForm near a WaterArea with most of it is covered by a %BodyOfWater.
 SlopedAreaA 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.
 UplandAreaAn UplandArea is a LandArea elevated above the surrounding terrain.
 ValleyA Valley is an area of low-lying land flanked by higher ground. Valleys typically contain a stream or river flowing along the valley floor.
 VolcanoA 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).

Show simplified definition with tree view
Show full definition (without tree view)
Show full definition (with tree view)

Sigma web home      Suggested Upper Merged Ontology (SUMO) web home
Sigma version 3.0 is open source software produced by Articulate Software and its partners