- mouseover the section should display the popup, not just mouseover on the dot
- after a click on the dot, clicking anywhere else should close the popup
In addition, it wasn't immediately clear to me that zooming in would show more detail.
Very cool, great job.
Mouseover on the whole section is definitely nicer but unfortunately it caused some performance problems in IE (rendering a ton of paths is slow). Hopefully we can figure out a more performant way of doing that.
One disadvantage of closing the popup on any click is that you might want to drag the map with the popup open, though it would be nice to not have to click the 'x'. Certainly something to consider.