A paradata documentation methodology for the Uncertainty Visualization in digital reconstruction of CH artifacts.

The virtual reconstruction of no longer existing historic structures is obviously a subjective process that simplifies a visualization of the historical original monument. In this paper we define a methodological procedure focused on the validation of the 3D reconstructive model. The case study reported, cause of its complexity and overabundance of informations, allows to focus the attention to the level of subjectivity that concern the 3D modelling process trying to find a methodological solution to visualize the uncertainty level of the reconstruction process: the goal is to create an hypothetical virtual reconstruction based on a 3D model scientifically correct in morphological and dimensional terms derived from the integration of 3D recording, historical documentation and renaissance representations. A methodological workflow from data acquisition to the formulation of reliable hypotheses related to the 3D virtual-model of Porta Aurea ables to allow the verification of the assumptions used during the reconstruction pipeline is proposed.