Atvis: A New Transit Visualization System

This chapter presents Atvis, a system to visualize transit data. Atvis is capable of representing bus route and traffic information at an abstract level. Compared with the traditional map-based geographical information system, Atvis focuses more on ridership, visualizing traffic data at or between stops, and interstop relationships, disregarding information that may not be essential to a user. This chapter describes the design and implementation of the Atvis visualization system and discusses how it can be used to observe transit patterns.