This is a sample image once you have selected your area of interest by using the mouse to draw
a box, clicked on the 'Zoom into Selected Area' button and then clicked on the 'Optimise Colours' button.
Note; the temperature differentiation in this image is enhanced as the colours are optimised for the full
temperature range that appear within your selected area i.e the coldest areas appear dark blue and the warmest
areas are dark red.
