Applied Geographics, Inc., in coordination with the Cambridge Community Development Department and the Citywide Growth Management Advisory Committee, is using GIS technology to perform a City-wide zoning analysis. In particular, the study has focused on the height limitations that are imposed for the City's zoning districts and on identifying the potential need for transition zones in order to manage future growth. The backbone to this analysis has been the robust GIS database that the City of Cambridge has compiled. This data was valuable in performing a thorough and accurate analysis, as well as in illustrating the analysis to the members of the Citywide Growth Management Advisory Committee. A key technical aspect of this project has been the dual use of ARC/INFO and ArcView GIS. ARC/INFO tools were utilized for performing the topology-reliant aspects of the analysis (e.g., right-polygon/left-polygon relates to identify boundaries with the greatest height differential). The ArcView 3D Analyst extension is being used to dramatically illustrate the three-dimensional elements of the analysis to the planning staff. The completed 3D Analyst project overlays the extruded building footprints with the zoning districts and height differential lines. This allows the staff to visualize the enforced height limits and the extent to which these height capacities are being used by existing building structures. A customized extent tool allows the user to save relevant view perspectives and fly between or zoom directly to these extents. This paper/presentation will focus on the benefits and uses of a complete municipal GIS data set and the cooperative uses of ARC/INFO and ArcView GIS functionalities in performing this analysis.