Dendrometer
Kramer's Dendrometer
The Dendrometer (according to Kramer) is a simple measurement device that is suitable for the estimation of basal area per hectare, stand volume and rough estimates of tree height and volume partitioning of single trees. The Dendrometer II is manufactured and distributed by the Department of Forest Inventory and Remote Sensing at the university of Göttingen.
Height measurement
Hold the dendrometer vertically before the eye (opening on top) and aim at the tree to be measured. Adjust the distance of the Dendrometer from the eye or your distance from the tree until the points k and h correspond to the tree tip resp. to the bottom of the trunk. The relation of the section hi to line hk is 1:10. the height of point i corresponds to 1/10 of the tree height. In order to calculate the tree’s height measure the distance from i on the tree to the tree base and multiply by 10.
Estimation of basal area per hectare
The estimation of basal area is based on the principle of relascope sampling invented by Walter Bitterlich.
