The Triangle Technique, equations, measurement diagrams, and derivations were developed by Michael Taylor and.
Steps in measuring the height of leaning trees: Plumb tip to ground to find point C. Plumb from two directions at right angles to each other, preferably in the plane of lean and at right angles to this plane. Measure distance from operator to plumb point (C) - not from the operator to the base of the tree. Total height is defined as: the vertical distance from the base of the tree to the uppermost point (tip).
In forests where leaning trees are common, measuring the linear distance (or slope distance) from base of the tree to tip may be more appropriate. The linear distance will be greater than the vertical distance. The height of the tree can be estimated using the Pythagorean theorem and the following steps: 1.
Measure out a horizontal distance from the tip of the tree until it is clearly in view.
The other two cases are those where both the top of the tree and the base of the tree are above eye level, and where both the top of the tree and base of the tree are located below eye level.
2. Calculate the perpendicular distance from the tip of the tree to the ground (rise), using %slope readings as. To find the height of the tree look through the hand level and note the number on the scale, it represents a percentage of the distance that you from the tree. If it reads then the distance you are from the tree is the same as the height of the tree. Tree Measurement Tips Stand a minimum of feet away from the tree you are measuring to ensure that you are hitting the top-most part of the tree’s crown with your laser rangefinder.
•Use your laser rangefinder’s continuous scan mode to explore the top of the tree’s. Tree Heights: Leaning Trees For trees leaning 25% (about 15°) or more from vertical: Locate point on ground directly under tip of leaning tree. Measure height A B. Measure horizontal distance B C. Tree Height = Horizontal Distance x [Tan (α) + Tan (β)] If the base of the tree is above the observer (i.e.
If alone pick a distinctive point on the ground to mark this point.
observer on the downward slope), the following formula is used to get a total tree height: Tree Height = Horizontal Distance x [Tan (α) – Tan (β)] 3. Suunto Clinometer.