The goal of this research is to develop an interactive and collaborative geodesign tool utilizing existing immersive virtual environments. The geodesign tool will enable the design of landscapes in a simulated virtual environment using interactive modeling tools that incorporate data from existing GIS databases. In his keynote address Flaxman (2009) defines geodesign as ‘a design and planning method which tightly couples the creation of design proposals with impact simulations informed by geographic contexts.’ This points out the potential importance of its possible guidance function for planners and designers. However, he also suggests that geodesign has thus far fallen short in a number of critical areas.