chapter  2
- Data Foundations
Pages 30

Since every visualization starts with the data that is to be displayed, a first

step in addressing the design of visualizations is to examine the character-

istics of the data. Data comes from many sources; it can be gathered from

sensors or surveys, or it can be generated by simulations and computations.

Data can be raw (untreated), or it can be derived from raw data via some

process, such as smoothing, noise removal, scaling, or interpolation. It also

can have a wide range of characteristics and structures.