The SketchUp file is simply an aerial. To see the buildings, go to the url linked below, to that .kmz file. It contains buildings sent directly from ArcGIS to Google Earth, using the shp-to-kmz plug-in so that the buildings are extruded in relation to elevation. Building height for all buildings is set to 2 stories. Original building footprints digitized in ESRI software by the Environmental Coordination Services, City of Ann Arbor, Matthew Naud, Environmental Coordinator.