This paper appraises the role of Virtual reality modelling language (VRML) based 3D computer based Urban and Heritage models in assisting professional collaboration on common tasks and engaging the participation of the general public in decision making. The University of the West of England (UWE) have created such models of both a significant area of central Bristol and for the Tower of London. The model and associated information can be interactively viewed through low-cost WWW browsers and updated on-line. The model is held to be a useful analogue for linking available information in more accessible form. Use of an underlying Geographic Information System (GIS) allows other information to be readily associated with elements within the models. The costs of creation and ownership of traditional and Digital Models are compared with those of GIS generated models. Developments are discussed to improve and ease collaborative creation and use of such models.