“BIM Survey”. Critical Reflections on the Built Heritage’s Survey

Legislative Decree 50/2016 and the subsequent Ministerial Decree MIT 560/2017 create an obligation, in Italy, for the digitization of building contracts. This is an adjustment, in terms of internationalization, regarding the adoption of BIM processes in the building field. For new design these processes are widely shared both in terms of interoperability and transparency between various professional figures involved, but above all thanks to the containment of costs of planning, building and management of the work in its life cycle. Applying the same processes to existing historical buildings, of which our country is most composed, does not find the same consensus: fundamentally due to the need to use standardized components that do not adapt to peculiarities of a historical architecture, where an obvious geometric reading is not always possible. Therefore, a whole series of problems arise concerning the documentation, communication and representation of the historical building as well as important implications in the field of surveying, very often mentioned in tender procedure as a prerequisite for the construction of a BIM model. This scenario opens up questions of an epistemological nature which are partly addressed in this document. A survey path, in the direction of “BIM Survey”, is carried out by testing the potential in new forms of modeling/information through visual algorithms (VPL) on some parts of the Municipality of Accumoli, following the earthquake that struck central Italy in 2016.