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Code Wrapper

What is the relation between Polaris and Tableau Public? Is Polaris merely a development of the latter or are they completely unrelated?
One of the only criticisms that I can come up with is that this application requires a certain degree of skill and mathematical understanding.
This paper focuses on the basic concepts that form the foundation of visualisation as a major application area of computer graphics. I found it useful that all the techniques for graphic representation, such as use of colour, size and shape, were discussed. Also ideas such as the type of view (single vs. multiple), filtering and focus were interesting and valuable. I did find one (small) glitch however, and perhaps it has more to do with the actual process of visualisation than with the article itself.

"...In contrast, non-spatial data can be visually encoded using spatial position, but that encoding is chosen by the designer rather than given implicitly in the semantics of the dataset itself".

I find this characteristic of visualisation to be problematic as it introdudes the notion of subjectivity into a technique that should, in most cases, reflect only objective data and representations.

Infovis and interaction

I like how the authors distinguished between "representation" and "interaction". While this differentiation may appear obvious it was nice to understand their perspectives regarding the two. "Interaction" is an abstract term and difficult to define but they attempted to divide user intent into seven categories which I though worked wuite nicely.