Wow, this chapter was so much easier to read than Chapter 2! What a wonderful example to detail the thought process for a visualization model. I really appreciated the author's thoughtfulness and decision-making process on his Kickmap map of New York's subway. I've taken the subway in New York, but was fortunate enough to have a native New Yorker be my tour guide, no thinking on my part was necessary, thank goodness!
Include the essentials and Geography is about relationships: use easy references (like the Statue of Liberty) but don't include everything
Leave out the clutter: sometimes accurate depictions can be confusing, simplifying it can make for easier reference; i.e. crisscrossing of subway lines can be simplified to user routes
Color: good tool to use and helps user to easily identify
Prototype - try a version with everything on it and then eliminate
Different versions for different situations: airport maps come to mind with this - when in an airport's tram you don't need a whole map of the airport, just what concourse and main sections it stops at; conversely when navigating the concourses, an overview is good to get from one to the other, and a more detailed version when I get to that concourse.
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