What is a Void?

Voids are the spaces inside a unit (e.g., aquifer) or its material (e.g., the sandstone material of an aquifer), and might contain fluid bodies. Voids are differentiated from porosity, in that porosity is a ratio of void volume to total volume of unit plus voids, while voids are the spaces themselves. It is important to conceptually differentiate voids from units and their containers, in order to represent, for example, the volume of fractures, caves, or pores in a particular unit or its portion.

Realizations

Data model	Concept name	Definition
OGC GWML2	HydroGeoVoid	Voids are the spaces inside a unit (e.g., aquifer) or its material (e.g., the sandstone material of an aquifer), and might contain fluid bodies. Voids are differentiated from porosity, in that porosity is a ratio of void volume to total volume of unit plus voids, while voids are the spaces themselves. It is important to conceptually differentiate voids from units and their containers, in order to represent, for example, the volume of fractures, caves, or pores in a particular unit or its portion.
IFC 4.4+	Void	Same as OGC GWML2

Specializations (Types of Voids)

Source	Type	Link	Definition
BRGM	Registry	https://data.geoscience.fr/ncl/CaviTy	This register lists all the types of cavities. By cavity is meant an empty space in a rocky environment, of millimeter size (microcavities) to multidecametric (cave), filled with a gas or liquid phase.

Properties

FAQ

GitHub issue

https://github.com/opengeospatial/Geotech/issues/24