The geometric Documentation is a sub-set of the integrated documentation of CH (bibliographic, historic, archaeological, architectural, cartographic, legal etc.)
The geometric documentation of monuments records their present, as this has evolved through time and provides the necessary base material for those who study their past as well as for those who take care of their future.The necessity of geometric documentation was first foreseen in the Venice Charter
(https://www.icomos.org/en/179-articles-en-francais/ressources/charters-and-standards/157-the-venice-charter)