A map of Massachusetts that highlights the "Western Massachusetts" counties.
Note, this is derived from existing county map SVG as found at:
https://upload.wikimedia.org/wikipedia/commons/9/9b/Map_of_Massachusetts_highlighting_Barnstable_County.svg
and highlighting counties based on low-res JPG found at:

https://en.wikipedia.org/wiki/File:WestMassGreen.JPG
Own work
Crazytonyi