I'm working on something that required the same information. I did a little testing and you can get this value by looking at the parent window.
This also works.
Thank you Robert for your answer.
I'm using Iframe with different origin so I cannot use your code.
Check out this sample code. Assuming you are using a Jive App that is linked to a Place or Action context, at which point you need to know "Where you are" so you can apply the proper information in your app.
Hope this helps. =)