SI is now used on forest cover maps and replaces the site class labels (G, M, P, L).
Figure 2.6 shows the former map labels and the ones currently used.
Figure 2.6. Format of old and new forest
cover map labels. (Click on image to see enlarged comparison view)
Consider these two labels for a polygon (Figure 2.7):
Figure 2.7. Inventory and silviculture
labels for a polygon.
Note the following:
- Site index is only reported for one species in the labelthe leading species (Hw in
the inventory label and Fd in the silviculture label).
- If the silviculture and inventory labels have the same leading species,they must have
the same site index. If they differ, site index may differ.
- Age is total agenot breast height age.
- Height is average heightnot top height.
- The trees sampled for height and age may not be unsuppressed and undamaged.
- Height and age may be estimatednot accurately measured.
- In a multi-layered stand, all layers with the same leading species must have the same