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When creating 3D city models, selecting relevant visualization techniques isa particularly difficult user interface design task. A first obstacle is thatcurrent geodata-oriented tools, e.g. ArcGIS, have limited 3D capabilities andlimited sets of visualization techniques. Another important obstacle is thelack of unified description of information visualization techniques for 3D citymodels. If many techniques have been devised for different types of data orinformation (wind flows, air quality fields, historic or legal texts, etc.)they are generally described in articles, and not really formalized. In thispaper we address the problem of visualizing information in (rich) 3D citymodels by presenting a model-based approach for the rapid prototyping ofvisualization techniques. We propose to represent visualization techniques asthe composition of graph transformations. We show that these transformationscan be specified with SPARQL construction operations over RDF graphs. Thesespecifications can then be used in a prototype generator to produce 3D scenesthat contain the 3D city model augmented with data represented using thedesired technique.

Prototyping Information Visualization in 3D City Models: a Model-based Approach