Innovative and efficient data census on a cloud based digital twin provided by mobile mapping.

The article introduces the use of modern indoor mobile mapping systems (iMMS) equipped with a high resolution photographic camera, for the realization of asset acquisition campaigns of large building sites and for the generation of Digital Twins. The mapping project of a large part of the social housing real estate of the Municipality of Milan is taken as an example. The technical specifications and management methods of the 3D measurement and photographic acquisition processes in the field and the processing workflow, quality testing/certification and way to share on the cloud the Digital Twins are described.