Haga

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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 similar to the Blume Leiss. A button enables the actor to lock the needle where the measurement value can be read.

Figure 2: Live view measuring tree bottom

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Remember the value and measure the crown.

Figure 2: Live view measuring tree crown

The difference between the measurements will be tree height – \[ {h_t} = {h_c} - {h_b} \].

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