At first, let me thank you for your reply :)! Let's compare the left picture and the right of your attachment 2. I think the left picture sits on the location too, and with the legend I can see the change of one hotspot over the time. Theres just one thing we can't analyse, for example if we look at a sporadic hotspot, when exactly it was hotspot and when it was not. This is possible in the right image but also only in the peripheral areas because inside the view is blocked. So I wonder if we really need the right picture hmm