Data Visualization is the art of understanding your Data
Data visualization is the presentation of data in a pictorial or graphical format. It enables decision makers to see analytics
presented visually, so they can grasp difficult concepts or identify
new patterns. With interactive visualization, you can take the concept a
step further by using technology to drill down into charts and graphs
for more detail, interactively changing what data you see and how it’s
processed.
The big example is "Google Earth" formerly known as Keyhole EarthViewer