Zoom distance on Global Picture

## I'm submitting a ...
Check one of the following options with "x" and add the appropriate label to the issue as well

[X] Bug report 

[ ] Regression (behaviour that used to work and stopped working in a new release)

**Describe the Issue**
Is it possible to set the zoom to be able see the entire map on the global picture? Currently we can't see the entire map in one view. This would improve interface for users looking into trend analysis.

**Expected Behaviour**
Same as before but with option to zoom out a bit further.

**Additional Context**
Add any other context about the problem here.

Happy to discuss in more detail at a suitable time.

Requested Delivery Date: 01/10/2018 - Not too urgent