Clinomaster
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|optical distance measurement | |optical distance measurement | ||
Revision as of 11:47, 12 June 2012
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This section is still under construction! This article was last modified on 06/12/2012. If you have comments please use the Discussion page or contribute to the article! |
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 actor and the tree 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
To measure tree heights, look through the sighting viewer and focus parallel the trunk. Both eyes open, Hairline can be seen caused by optical illusion.
Remember the measurement value and measure the tree crown. The 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
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