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Virtual Navigation



Virtual Navigation in Nu.M.E. Maria Elena Bonfigli
Computer Science Aspects Network Applications Virtual Reality

DeskTop Virtual Reality Application, accessible from Net environments

Nu.M.E. was initially created as a Desktop Virtual Reality application, so that all users could access a part of virtually reconstructed Bologna from the Internet. A light version of the application is available. It is reduced and simplified so that it can be downloaded at normal speed and viewed with a normal PC. A model that is richer in detail at a higher resolution which is also available locally with Internet technology at the CINECA   VIS.I.T. (Visual Information Technology) laboratory and also at the Bologna Public Workstation in the Bologna Municipal Office of Public Relations in Palazzo d'Accursio (Piazza Maggiore, Bologna).

Access to Nu.M.E. from and Internet environment allows experts in history to work together wherever, fosters the enrichment of the collective memory, reaches an unlimited number of users, and promotes the project.

VRML (Virtual Reality Modeling Language) and Java , which was integrated using External Authoring Interfaces (EAI), allowed for 3D modeling in an urban environment and the management of the historical database. At the same time it guarantees the development of portable, platform-independent, standardized, interactive, dynamic 3D worlds.


The user interface includes these fundamental features:

  • visualization of the 3D world, navigation bar permits all types of movement and viewpoints (including viewpoints that are not possible for the human observer in real Bologna);
  • time navigation bar allows for choice of historical period to be visualized;
  • a 2D map of Bologna includes a cursor that constantly indicates which parte of the city one is in.

The historical period to visit can be chosen either through a text field, in which the visitor types in the year, or a scrollbar which is comanded by the mouse. Whenever the time navigation function is used, the entire interface is updated. A button on the console shows (default) or hides the 2D map of Bologna, which shows the visitors position as he moves through the city. .