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Relationships
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| Instances | BodyOfWater | A BodyOfWater is a connected body of water with established boundaries marked by either geographical features or conventional borders. |
| | ClimateZone | &ClimateZone is a subclass of GeographicArea in which regions are classified according to their long-term weather conditions. The subclasses of ClimateZone are based on the Koeppen Climate Classification system. In the Koeppen system, climate zones are distinguished based on temperatures and rainfall. |
| | Entity | The universal class of individuals. This is the root node of the ontology. |
| | 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. |
| | Hemisphere | Hemisphere is the class of GeographicAreas that are halves of the Earth, as traditionally divided into the Northern and Southern Hemispheres along the equator and into the Eastern and Western Hemispheres along a north-south line running 20�W and 160�E. |
| | Object | Corresponds roughly to the class of ordinary objects. Examples include normal physical objects, geographical regions, and locations of Processes, the complement of Objects in the Physical class. In a 4D ontology, an Object is something whose spatiotemporal extent is thought of as dividing into spatial parts roughly parallel to the time-axis. |
| | Ocean | Ocean is the class containing the oceans that are the major subdivisions of the WorldOcean. According to the International Hydrographic Association, there are five oceans: the AtlanticOcean, PacificOcean, IndianOcean, SouthernOcean, and ArcticOcean. Note: The largest oceans, the Atlantic and Pacific, are subdivided into Northern and Southern regions, but those regions are not separate Oceans. |
| | Physical | An entity that has a location in space-time. Note that locations are themselves understood to have a location in space-time. |
| | PolarClimateZone | PolarClimateZone is a subclass of ClimateZone characterized by having an average temperature less than 10 degrees Celsius in the warmest month. This is Koeppen climate system Type E. No agriculture is supported in polar climates. |
| | Region | A topographic location. Regions encompass surfaces of Objects, imaginary places, and GeographicAreas. Note that a Region is the only kind of Object which can be located at itself. Note too that Region is not a subclass of SelfConnectedObject, because some Regions, e.g. archipelagos, have parts which are not connected with one another. |
| | SaltWaterArea | A WaterArea whose Water is saline, e.g. oceans and seas. |
| | SelfConnectedObject | A SelfConnectedObject is any Object that does not consist of two or more disconnected parts. |
| | WaterArea | A body which is made up predominantly of water, e.g. rivers, lakes, oceans, etc. |
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SelfConnectedObject |
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