Isarithmic maps are essentially topographic or contour maps, wherein a third variable is represented in two dimensions by color, or by contour lines, indicating gradations. I had never

Isarithmic maps are essentially topographic or contour maps, wherein a third variable is represented in two dimensions by color, or by contour lines, indicating gradations. I had never seen such a map depicting political data — certainly not election returns, and thus sought to create them.The isarithmic depiction does an excellent job of highlighting several broad patterns in modern U.S. political history. 

This animated interpretation accentuates certain phenomena: the breadth and duration of support for Roosevelt, the shift from a Democratic to a Republican South, the move from an ostensibly east-west division to the contemporary coasts-versus-heartland division, and the stability of the latter.

More broadly, this video is a reminder that what constitutes “politics as usual” is always in flux, shifting sometimes abruptly. The landscape of American politics is constantly evolving,  as members of the two great parties battle for electoral supremacy.

In this multimedia video produced by the Wisconsin Educational Communications Board, Marshall Pecore,

In this multimedia video produced by the Wisconsin Educational Communications Board, Marshall Pecore, forest manager for Menominee Tribal Enterprises, describes the forest's economic and cultural value, and the management techniques used in order to sustain it. He identifies invasive species and diseases as a major threat to forest health—a threat that may intensify as Wisconsin's climate warms. Uploaded on Dec 22, 2010

More info and educational resources available at here.

Production Credits:
Finn Ryan -- producer, director
David Nevala -- photography, video, editing
Asche and Spencer -- music

This multimedia video produced by the Wisconsin Educational Communications Board follows Kat Becker and Tony Shultz, third generation