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KB Term:
UndergroundArea
Sigma KEE - UndergroundArea
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underground area
The class of regions
located
Below
the surface of the earth.
Relationships
Parents
geographic area
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
Region
s are not classed under
GeographicArea
.
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