We present a web-based visualization for the analysis of event-based movement of individuals within a building, as well as for the observation of groups, patterns, and outliers in a population of employees. The visualization comprises a novel organizable event quiltmap, and a 3D spatial heatmap. The quiltmap can be used to cluster similar event trajectories based on a spatial metric. The 3D view reveals employee movements throughout a day in the context of building sensor data. A small multiple display supports the browsing of multiple intervals, and individual event sequences can also be compared for the same employee across multiple days through individual quiltmaps. We demonstrate the approach on a VAST contest dataset of event and sensor measurements and show that it can capture complex and subtle aspects of the event spatiotemporal data.