Each rectangle represents only the forest area of an Australian state, and is therefore a portion of the total state area.
The ratio of forest area to total state area is indicated in the state's tooltip (mouse over a state, and see the Forest cover field).

Each state (rectangle) is divided into cells (small squares) forming a grid. Each cell represents an area unit corresponding to 178.49 km² of forest in real life.
Important : the positions of cells on the rectangles do not represent the real positions on the actual state
Australian Capital Territory data was merged with New South Wales'.
Dates range from October 1st, 2019 to January 11th, 2020.