Diameter at breast height (dbh) of the trees and shrubs ≥12 cm dbh – in ten classes. Reference: Field Survey (MID 60: Brusthöhendurchmesser, MID 62: Umfang)

Code	Text	NFI1	NFI2	NFI3	NFI4	NFI4b	NFI5
-1	n/a	x	x	x	x	x	x
1	12-20 cm	x	x	x	x	x	x
2	21-30 cm	x	x	x	x	x	x
3	31-40 cm	x	x	x	x	x	x
4	41-50 cm	x	x	x	x	x	x
5	51-60 cm	x	x	x	x	x	x
6	61-70 cm	x	x	x	x	x	x
7	71-80 cm	x	x	x	x	x	x
8	81-90 cm	x	x	x	x	x	x
9	91-100 cm	x	x	x	x	x	x
10	>100 cm	x	x	x	x	x	x