Size of ech rectangle represents the territory population. The sum off all rectangles represent the total population. In this example, Australia population.
Each rectangle is coloured as in the legend.
In Treemap you see the value of your data confronted to territory population. If you move cursor over rectangles it will show you data and population.

• Background

Select your favorite background

• Center

Resituates and resizes map to original position.

• Level drill up/down

Changes administrative boundaries levels.