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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. | 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. | ||
| − | [[file: haga01_portrait.jpg|Figure 1: Haga altimeter]] | + | [[file: haga01_portrait.jpg|thumb|300px|Figure 1: Haga altimeter]] |
| − | [[File:using haga.jpg|Using a Haga altimeter]] | + | [[File:using haga.jpg|thumb|300px|Using a Haga altimeter]] |
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The handling of the Haga is similar to the [[Blume Leiss]]. A button enables the actor to lock the needle where the measurement value can be read. | The handling of the Haga is similar to the [[Blume Leiss]]. A button enables the actor to lock the needle where the measurement value can be read. | ||
| − | [[file: haga02_measurement-bottom.jpg|Figure 2: Live view measuring tree bottom]]. | + | [[file: haga02_measurement-bottom.jpg|thumb|300px|Figure 2: Live view measuring tree bottom]]. |
| − | [[file: haga03_measurement-top.jpg|Figure 3: Live view measuring tree crown]] | + | [[file: haga03_measurement-top.jpg|thumb|300px|Figure 3: Live view measuring tree crown]] |
Revision as of 16:18, 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! |
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.
Handling
The handling of the Haga is similar to the Blume Leiss. A button enables the actor to lock the needle where the measurement value can be read.
Remember the value and measure the crown.
The difference between the measurements will be tree height –
\[ {h_t} = {h_c} - {h_b} \].
The difference between the measurements will be tree height –
\[ {h_t} = {h_c} - {h_b} \].
[[Category:]]
