First method of inventory (M1) | Second method of inventory (M2) | ||
---|---|---|---|
Period | 1961–1979 | 1976–2004 | 2005–2014 |
Spatial sampling scale | Department administrative unit (dau) | National | |
Time interval between two inventories | 12 years on average | Annual | |
Information on forest composition | No | Yes | Yes |
Number of dau and inventories | 74 dau × 1 inventory 5 dau × 2 inventories | 1 dau × 1 inventory 69 dau × 2 inventories 20 dau × 3 inventories | All forests every year |