Made by the Ultramundum Foundation on request from the Turin Province, the virtual model of the antire province allows for the interactive free exploration of the entire surface on a standard personal computer. It is not a map, but a true software diorama, with many details, of the entire province surface. This product will be the base platform for a variety of applications made by citizens, public boides, organizations and companies. By using this 3D model tools the technical departments of the Procince will be able to visualize any project in an interactive manner and show it through the internet to other departments or the citizens. In time new multimedia contents will be added to this platform, creating a 3D encichlopaedia of the Province. Users can position themselves at any distance from the ground, finding all building that are really there, as well as roads, railroads and rivers. The reconstructed area is so large that it would impossible to process it on a standard computer. A dynamic data loading and detail genartion algorith has been developed. All data, derived from official cartography, have been reprocessed to be usabe in real-time. Many layers with decreasing resolution have been incapsulated in Tabulae and are used at different distances of the user from the ground. Data on soil characteristics allowed use of Foundation's exclusive automatica detail generators. Buildings are drawn as yellow prisms and will be substituted by realistic models when specific automatic detail generators will be available. Note that more than four millions buildings are currently on display. The Foundation can arrange interactive demonstrations on request, because this product can not be freely distributed yet.