Heather McCartney School Photo

Fantastic pic of Heather ,taken I think 1979/1980, that was posted on Emma's Blog http://heathermccartneyfans.blogspot.com/2011/09/college-photo.html dedicated to Heather,does anyone knows where or when was it taken or any of the people in it?
Please if you have any infos about this pic don't hesitate to share them below,or you can emial Emma,her adress in on the left side of her blog.
Thanks.