Area of precipitation to be observed on the ground. Area is modelled as continuous patch of abstract earth surface (without topology) defined by an exterior Ring and 0..n interior Rings ("holes").
Exactly one rain (water) phase can be defined for the area.
The continuity (as in continuous rain) and the showeriness (as in rain showers) of the rain can both be specified as a floating point number between 0 and 1.
Precipitation areas may contain 0..n inner areas with different rain phase, continuity and/or showeriness qualities. These area are defined by using innerArea element which is a property containing or referring to another SurfacePrecipitationArea object. The exterior of the contained area object must be completely inside the exterior and not even partly cover the area inside any of the interior Rings of the parent object. If a value for any of the qualities is not given, it is assumed to be the same as in its parent.
Concrete Met Object type for storms.
See http://sweet.jpl.nasa.gov/2.1/phenAtmoPrecipitation.owl#StormConcrete Met Object type for low pressure centers.