Haga
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==Handling== | ==Handling== | ||
| − | The handling of the Haga is similar to the [[Blume Leiss]]. | + | The handling of the Haga is very similar to the [[Blume-Leiss]] instrument. Same like the Blume-Leiss the Haga hypsometer has different scales for reading [[tree height]] measurements from different predefined fixed distances. The scales for distances of 15, 20, 25 and 30 meter are fixed on a rotating rod and the right scale has to be selected. |
| − | A button enables the | + | |
| + | A button enables the user to lock the pointer needle where the measurement value can be read. | ||
Remember the value and measure the crown. | Remember the value and measure the crown. | ||
The difference between the measurements will be tree height: | The difference between the measurements will be tree height: | ||
Revision as of 05:26, 14 June 2012
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This section is still under construction! This article was last modified on 06/14/2012. If you have comments please use the Discussion page or contribute to the article! |
Contents |
General description
Haga is a device to measure tree heights within distances of 15, 20, 25 and 30m to the tree by the trigonometric principle.The distance to three can optically be determined. Additionally there is a scale for slope measurements in % implemented. Therefore a levelling board is available.
Figure 1: Haga altimeter
Using a Haga altimeter
Handling
The handling of the Haga is very similar to the Blume-Leiss instrument. Same like the Blume-Leiss the Haga hypsometer has different scales for reading tree height measurements from different predefined fixed distances. The scales for distances of 15, 20, 25 and 30 meter are fixed on a rotating rod and the right scale has to be selected.
A button enables the user to lock the pointer needle where the measurement value can be read. Remember the value and measure the crown. The difference between the measurements will be tree height: \[ {h_t} = {h_c} - {h_b} \].
Figure 2: Live view measuring tree bottom
Figure 3: Live view measuring tree crown
Applications
Related articles
[[Category:]]
