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地理区域 |
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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大陆边缘 | ContinentalMargin is class of SubmergedLandAreas that are the extension of land underwater at the edge of a continent, before a drop to the sea floor. A ContinentalMargin includes the ContinentalShelf and the continental break, slope, or rise at the outer edge. |
| 大陆棚 | A ContinentalShelf is a natural undersea extension of land around a Continent. The shelf is a gently sloped (average less than one percent) plain that is an extension of the CoastalPlain found off the coast of most continents. |
| 海运货架区 | MaritimeShelfArea is a subclass of MaritimeClaimArea that covers SubmergedLandAreas claimed by an adjacent geopolitical area. The LawOfTheSea defines the continental shelf as extending up to 200 miles (NM) offshore and including the resources found therein. The defined claim area does not correspond exactly to a geological ContinentalShelf, but if there is one, the two areas will overlap spatially. |
| 海底区域 | SeabedArea is the class of SubmergedLandAreas that are part of the sea floor. |