As a designer, it can be hard to optimize the design of a visualization so that the viewer can fully understand the message being portrayed. The more creative you get can sometimes clutter the visual in an attempt to make something complicated look simple.
The founder of ffunction, Sébastien Pierre, put together a useful chart which can serve as a guide when working with data visualization. Look at it as a “What is Data Visualization?” guide. Depending on which way you angle the infographic, you will get different results. It all depends from what angle you wish to showcase your data.
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Sébastien Pierre: "Visualization should reveal hidden patterns and trends within the data. It should explore a topic, help make a discovery or tell a story. Whatever the goal, you have to turn the data into information that people can understand."