Clinomaster
From AWF-Wiki
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# sight the object (tree) and focus parallel with both eyes open | # sight the object (tree) and focus parallel with both eyes open | ||
#* the hairline can be seen by optical illusion | #* the hairline can be seen by optical illusion | ||
Revision as of 08:22, 5 July 2012
Contents |
General description
The Clinomaster (figure 1) is a device that is used to measure slope and tree heights within fixed distances (15m, 20m) to the tree using the trigonometric principle. Therefore the angles between the user and the tree top and bottom are measured. The Clinomaster has an optical rangefinder to measure distances (15m, 20m (figure 2)) optically and a sighting viewer to look on the height scales.
Figure 1: Portrait
Figure 2: Scales
Handling
Height measurement
- sight the object (tree) and focus parallel with both eyes open
- the hairline can be seen by optical illusion
- remember the measurment value and measure the tree crown
- difference between the crown height and the bottom value is the tree height\[ {h_t} = {h_c} - {h_b} \]
Figure 3: Live view trunk bottom measurement]]
Figure 4: Live view crown measurement]]
| Advantages | Disadvantages |
|---|---|
| slope correction implemented | measurement value need to be remembered |
| optical distance measurement | fixed distances to the tree (could be difficult in closed forest stands) |
| independence of power sources (no batteries needed) | in dark forest stand optical measurement is difficult, no digital storage of measurement results available. |
Applications
