The VeLA research project, led by Ca’ Foscari University of Venice in collaboration with IUAV University of Venice, focuses on cataloging and analyzing historical graffiti throughout Venice, with a particular emphasis on the Palazzo Ducale. These graffiti offer valuable insights into the city's history and cultural landscape. The project has three main objectives: first, to create a comprehensive database of graffiti, including details on location, dating, and iconographic content; second, to develop an international digital survey protocol with standardized methodologies for consistency in data collection; and third, to enhance accessibility for individuals with sensory disabilities by creating digital and physical resources, such as 3D printed models. This article discusses the initial outcomes of the second objective, which is being addressed by the Geomatic Laboratory CIRCE at IUAV. The focus is on developing a systematic methodology for surveying and analyzing historical graffiti, particularly in complex contexts. The research employs structured light laser scanning technology to compare and analyze the acquired data, assessing geometric deformations using Cloud-to-Cloud (C2C) and Multiscale Model-to-Model Cloud Comparison (M3C2) analyses. The project's ultimate goal is to contribute to the conservation and enhancement of Venetian cultural heritage by providing a detailed and accessible digital resource, combining geomatic techniques with strategies for improving accessibility.