We have now covered the start and the end of the visualization pipeline
(see Figure 4.1), namely getting data into the computer, and, on the human
side, how perception and cognition help us interpret images. We have looked
at one fundamental visualization, namely the scatterplot. There are many
other visualization techniques and systems (see some examples in Table 4.1).
To make sense of them we need to organize methods into categories or tax-
onomies. This is necessary for us to structure our study of the ﬁeld. We ﬁrst
review the visualization pipeline and then discuss various ways to view the
multitudes of techniques and systems that have been developed to date.