Haga
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[[file: haga02_measurement-bottom.jpg|thumb|300px|Figure 2: Live view measuring tree bottom]]. | [[file: haga02_measurement-bottom.jpg|thumb|300px|Figure 2: Live view measuring tree bottom]]. | ||
Remember the value and measure the crown. | Remember the value and measure the crown. | ||
| − | [[file: haga03_measurement-top.jpg|thumb|300px|Figure | + | [[file: haga03_measurement-top.jpg|thumb|300px|Figure 3: Live view measuring tree crown]] |
The difference between the measurements will be tree height – | The difference between the measurements will be tree height – | ||
:<math> {h_t} = {h_c} - {h_b} </math>. | :<math> {h_t} = {h_c} - {h_b} </math>. | ||
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:<math> {h_t} = {h_c} - {h_b} </math>. | :<math> {h_t} = {h_c} - {h_b} </math>. | ||
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Revision as of 11:12, 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. <gallery
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 –
\[ {h_t} = {h_c} - {h_b} \].
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