1. Designing Clock View and Search View Visualization for Visual Analytics Law Enforcement Toolkit Chang Yoon Kim, Peter Adjiwibawa, Shantanu Joshi Ahmad Mujahid, Abish Malik, Ross Maciejewski, Insoo Woo, Yun Jang, David S. Ebert Project Summary  Exploration of criminal incident reports is an ever expanding issue for law enforcement agencies. The mobile Visual Analytics Law Enforcement Toolkit (iVALET) attempts to address this problem with a variety of features  iVALET provides a suite of interactive visual and analytical tools for data exploration and analysis  System features include:  Geo-spatial heat-mapping techniques for quick detection of anomalies  Multiple time series views for temporal trend analysis and prediction  Prediction algorithms for forecasting future criminal, traffic and civil (CTC) incident events Design Process (Continued) Search View  Each offense is allocated into one object class  Each object has parent and grandparent properties which are used to group and populate the object based on its parent and grandparent  The search function first checks the object if its grandparent property contains the search string. If it does then it directly puts the object to the list of found objects. If it doesn’t then continue checking its parent property until it compares with the object name itself References Abish Malik, Ross Maciejewski, Timothy F. Collins and David S. Ebert. Visual Analytics Law Enforcement Toolkit. IEEE International Conference on Technologies for Homeland Security, 2010 Jarke J. van Wijk and Edward. Cluster Calendar based Visualization of Time Series Data Colorbrewer: Color advice for maps. http://colorbrewer2.org/ Figure 1: a) Kernel density estimated heat maps employed for visualizing CTC hotspots b) Interactive menu to select the time range c) Time series view of CTC incidents aggregated by day Acknowledgements The authors would like to thank the VACCINE Public Safety Coalition for providing data and valuable user feedback. This work has been supported by the U.S. Department of Homeland Security’s VACCINE Center under Award Number 2009-ST-061- CI0003 Project Goals Clock View  Visualization of data over a 24-hour period in the format of a clock  Concentric circles to display different days, to make pattern recognition easier between different days  Variable hour slices for each hour, showing a more detailed view per hour with global maximums shown as darker colors Search View  Three-layer search function for iVALET Application  Enables the user to search through a three-layer criminal hierarchy (Crime Against, Crime Category and Offense)  Enables the user to collapse and hide the categories 1c 1a1b 77-96 58-76 39-57 20-38 0 -19 Design Process Clock View  Each slice of the clock is its own individual object  Different shades of colors have been added for contrast  The data is color coded dynamically at run time based on the data populating the clock view  The minute lines represent actual events during the day shown on the clock Figure 2: The iVALET application running on the iPad (also available for the iPhone), showing some of the currently available features of the iVALET application. Shown on the left is the Calendar View, and on the right the Clock View, both features given as projects for VIP students to complete. The Search View will also be available as a feature once development is complete Calendar View  The days of the week were implemented as an overview so that they stay in place even as the calendar view scrolls up or down  The height of each row is a linear function of the sum of crimes in a particular row. Thus rows with anomalous occurrence of crime now stand out based on size and color  The data is color coded dynamically at run time based on the data populating the calendar view  The font of the row with the most number of crimes is larger than the others to make sure it stands out even more Figure 4: The current implementation of the jump scroll. The user would touch the calendar overview that interests him/her the most in the calendar overview (the region represented by the box highlighted by the yellow outline) and immediately be taken to the appropriate location in the actual calendar view Figure 5: Several different search cases, showing the ability to search through three layers of criminal hierarchy Figure 3: Clock views showing hours and the number of incidents, with various combinations of enabled/disabled settings. From left to right, the settings page, grayscale enabled, hour slices enabled, no settings enabled (default view), hour slices and grayscale enabled, and hour slices, grayscale, and minute lines enabled