The SEAS Zone ontology describes systems named seas:Zones, that are connected through seas:ZoneConnections at their seas:zoneFrontiers.
Area is the quantity that expresses the extent of a two-dimensional figure or shape, or planar lamina, in the plane. Surface area is its analog on the two-dimensional surface of a three-dimensional object. Area can be understood as the amount of material with a given thickness that would be necessary to fashion a model of the shape, or the amount of paint necessary to cover the surface with a single coat. It is the two-dimensional analog of the length of a curve (a one-dimensional concept) or the volume of a solid (a three-dimensional concept). (source: Wikipedia)
The class of humidity properties of zones, zone connections, or zone frontiers.
Humidity sensors observe the humidity of a zone, zone connection, or zone frontier.
The class of population properties of zones, zone connections, or zone frontiers.
A Presence sensor observes the population inside a zone, zone connection or zone frontier.
Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled gage pressure)[a] is the pressure relative to the ambient pressure. (source: Wikipedia)
Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains. Volume is often quantified numerically using the SI derived unit, the cubic metre. The volume of a container is generally understood to be the capacity of the container, i. e. the amount of fluid (gas or liquid) that the container could hold, rather than the amount of space the container itself displaces. (source: Wikipedia)
The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume. The symbol most often used for density is �? (the lower case Greek letter rho), although the Latin letter D can also be used. Mathematically, density is defined as mass divided by volume: �? = m/V, where �? is the density, m is the mass, and V is the volume. In some cases (for instance, in the United States oil and gas industry), density is loosely defined as its weight per unit volume, although this is scientifically inaccurate – this quantity is more specifically called specific weight. (source: Wikipedia)
The absolute humidity is defined by the mass of water vapor per humid air volume.
The area of the Zone.
Links a zone, zone connection, or zone frontier, to the property that qualifies its humidity.
The humidity property has itself properties that quantify it, such as the specific humidity.
Links a zone, zone connection or zone frontier to the property that quantifies its population in terms of agents.
The population property may itself have properties such as the population flow.
The flow of agents that cross a zone, a zone connection, or a zone frontier.
The saturated vapor pressure of moist air.
The specific humidity is defined as the mass of water per unit mass of moist air.
Links an zone to another it is contained in.