Landscape protection measures apply to a considerable part of territory in the Island of Sardinia, where local valuable landscapes were deemed subject to strong anthropogenic pressure. Within this context, aim of the study presented in this paper is to supply quantitative evidence for a preliminary assessment of past and current urbanization processes in protected areas as support for revision and further development of existing protection strategies and measures within the framework of the Regional Landscape Plan and its update process currently under development. This contribution focuses specifically on landscape protection areas as defined by the National Law no. 1497/1939. The Analysis are based on the spatial data of the new Sardinian Regional SDI demonstrating the added-value of the availability of harmonized digital spatial data as support for spatial analysis and policy support.