Signature Map

I found the thread, but the link to the discussion (#4279) is broken...I did find the web site of the map, if this helps.

http://visitedstatesmap.com/

You can right click on images on the web, and in the context menu is a "View Image Info" link.  When you open that, you can see various data about the image on the web page.  It will sometimes tell you where the image is found on the web.  I used one of the maps in a thread, right clicked and opened the View Image Info.  In there somewhere I found the "visited states" link.

And I guess I lucked out.  I tried some other maps to reproduce what I did to write this, and not all of them have the same type of info.  The "Visited States" link was not included in several of the "image info" pages I looked at.