Designing Transparent Overlays
نویسنده
چکیده
1 Overview Multiple related displays and windows are common in monitoring and business environments where the user is trying to integrate different data views into a coherent information picture. Our particular application is the design of efficient visualizations for the management and operation of high-performance buildings, and our users are the planners and building operators responsible for making decisions about energy and building use in both the short and long term. Good design practice suggests that multiple variables are often best presented in a series of similarly indexed displays – the well-known “small multiples” method [1]. Sometimes, however, this approach is not optimal, especially in monitoring tasks where the allocation of display space may be restricted. For example, building operators need to monitor many aspects of building performance across a continuous time range, and to compare subsets of these ranges. Rather than replicate many data displays (one per range) it would be preferable to support overlays that subdivide the range into meaningful yet overlapping periods. We are exploring the use of transparency to visualize such event and interval overlays.
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