It is the elementary volume referring to a building. The term volumetric unit therefore indicates a built body whose top is made up of a real flat surface, for example a flat roof, or of an ideal flat surface which defines what can be considered the volume of the built body for the purposes of a calculation, albeit approximate of its volume. The height of this flat surface, real or ideal, is called the eaves height of the volumetric unit. Definition of the DECREE of 10 November 2011 Technical rules for the definition of the content specifications of the geotopographical databases. (Official Gazette n. 48 of 27/02/2012 - Ordinary supplement n. 37). Corresponds to the class (UN_VOL - 020101) Volumetric units of the DM.
