Types of Data
The most important part of a visualization of data is the data themselves. If it does not show the data clearly, a visualization can be pretty, interesting, technically well executed, and all kinds of other good things, but it fails in its basic task. In this chapter we will look at data, and time-based data in particular, with a view to understanding how they can best be represented. Different forms of data require different visualization techniques. Just as a photographer will use different equipment to photograph a Formula-1 race from that used in their still-life studio, a good visualization designer will adapt his tools to the data, producing a portrayal of the data that faithfully and naturally represents the data.