Integrated survey methods to obtain interpretative models aimed at cultural heritage conservation

New tridimensional models can be useful for programs of conservation of cultural heritage. Models make easier the understanding and the communication of particularly shaped architectonic structures, through a synthetic vision. Our aim is to integrate different survey techniques (with their own accuracy) with computer graphics technologies, to create a dynamic 3D model representing phenomena and processes to be considered for preservation and restoration planning. We show some experiences of survey on different periods structures, stressing the close relationship between survey techniques and conservation problems: - Some buildings of “Borgo del Valentino” (Torino), a neomedioeval complex, with structural problems that make an accurate survey necessary in order to restore it; - Povil Casaforte (Aosta), a medioeval building, in which metric survey has been a support for stratigraphic analysis of the complex wall texture; - Villa Raggio (Asti), a 1900’s villa, where we used a digital direct photogrammetry (control points are only used to verify the results). The model obtained can combine two different needs. On the one hand it had to be accurate in order to guarantee the usability for different technical purposes such as following the reconstruction projects or to schedule the routine maintenance and simulating technical installation. On the other hand it had to be photorealistic and user-friendly for an easy and effective representation, useful in virtual reality and other similar application.