WI Map

I had a very difficult time deciding which map to choose as one library professionals should know because, as someone else also stated, patrons want all kinds of information, and because much of the focus of this atlas is historical, and don't always reflect the current issues people want information on.
That said, I think the maps of the state government (page 84) and the population/congressional districts (pp. 82-3) are important for librarians to know because there are always questions about government and population, especially at the state level. The chart showing gubernatorial elections is wonderful (as is the presidential elections in WI chart on page 81).