Value encoding scheme for all three layers are listed below.

Forest loss year layer:

	2-49: forest loss in 1972-2019 (loss year = value + 1970);
	255: no forest loss detected.

Forest gain year layer:

	2-49: forest gain in 1972-2019 (gain year = value + 1970);
	255: no forest gain detected.

Forest establishment year layer: forest first detected by remote sensing image

	0: persistent forest since 1972;
	2-49: forest established in 1972-2019 (establishment year = value + 1970);
	100: non-forest in 2019;
	255: invalid data.