Different information are used to classify APs:

• Forest cover type (stand ht class)
• Crown density
• Site class
• Volume class

A. Small scale photography

1. Forest cover type: tree forest –F, Young plantation-p, Re-growth-R, Shifting cultivation-S, permanent cultivation-C, Blanks-B, Non-forest-W
2. Crown density: 5-19, 20-60 & >60%
3. Site class: Poor, medium, good and very good
4. Volume class: low (15-49), medium (50-99) & high (>100 m3/ha)

​B. Large scale photography

1. Cover type (plantation, pure, mixed, natural, degraded, re-growth forest)
2. Stand ht class: below 7.5, 7.5-12.5, 12,5-17.4, 17.5-22.4, 22.5-27.5 & > 27.5m
3. Crown density: 5-20, 20-40, 40-60, 60-80 & >80%