TM 5-6675-322-14
(d) Turn instrument 90° to the right and push release button.
Make observation with left edge of strip 1 alined on left edge of tree. Tree
diameter will be estimated by comparing it with wide, white strip 1 and four narrow
b a r s n e x t t o i t.
( e ) A t 1 5 m , o n e - h a l f o f s t r i p 1 c o v e r s 1 5 c m ; e n t i r e s t r i p c o v e rs
30 cm.
At 20 m, one-half of strip 1 covers 20 cm; entire strip covers 40 cm.
At 25 m, one-half of strip 1 covers 25 cm; entire strip covers 50 cm. At 30 m, one-
half of strip 1 covers 30 cm; entire strip covers 60 cm. Each bar is one-fourth the
w i d t h o f t h e - s t r i p .
Example:
At 20 m, strip 1 covers 40 cm and
10 cm.
Strip 1 and all four bars
25 m, strip one and all four bars
each bar covers
cover 80 cm. At
cover 100 cm.
(f) The operator estimates tree diameter by observing tree alined at
l e f t e d g e o f s t r i p 1 a n d o b s e r v i n g h o w f a r t o t h e r i g h t i t e x t e n d s o v e r s c a l e . If
tree diameter exceeds scale, the operator may increase his range from the tree, or
he may measure segments of the tree and then total the segments.
NOTE
Dimensions that do not exactly agree with bars must be estimated. This
method provides acceptable accuracy for forestry purposes.
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