Finn caliper

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The Finn caliper (also called Finnish parabolic caliper) is used to measure the [[Why measuring upper stem diameters|stem diameters]] at (or up to) 7 m (d7m). Figure 1 gives an illustration. By its name, it is originally from Finland and is being used in Northern European countries as well as in Germany and Switzerland. With pole and [[Caliper|caliper]], the height of 7 m has been found to be the maximum still manageable one; that is, it had been defined for practical reasons only.
The Finn caliper (also called Finnish parabolic caliper) is used to measure the stem diameters at (or up to) 7 m (d7m). Figure 11 gives an illustration. By its name, it is originally from Finland and is being used in Northern European countries as well as in Germany and Switzerland. With pole and caliper, the height of 7 m has been found to be the maximum still manageable one; that is, it had been defined for practical reasons only.
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Figure 11. The Finn caliper: fixed on a  pole the tree diameter can be read up to a height of 7m (Keller 2000).       
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The Finn caliper is relatively difficult to carry in the forest because the device consists of several calipers and various poles that are put together for the measurement.
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[[File:2.2.5.2-fig11.png|left|thumb|'''Figure 1''' The Finn caliper:  fixed on a pole the tree diameter can be read up to a height of 7m  (Keller 2005<ref  name="keller2005">Keller M. (ed.). 2005.  Schweizerisches Landesforstinventar. Anleitung für die Feldaufnahmen der  Erhebung 2004-2007</ref>).]]
  
{{SEO|keywords=upper stem diameter,tree diameter,forest definitions,forest inventory,tree measurement, single tree variables  
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The Finn caliper is relatively difficult to carry in the [[Forest Definition|forest]] because the device consists of several calipers and various poles that are put together for the measurement.
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==References==
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<references/>
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{{SEO|keywords=finn caliper,upper stem diameter,tree diameter,forest inventory,tree measurement,single tree variables  
 
sampling|descrip=The Finn caliper is used to measure the stem diameters at (or up to) 7 m tree height.
 
sampling|descrip=The Finn caliper is used to measure the stem diameters at (or up to) 7 m tree height.
 
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[[Category:Upper stem diameters]]
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[[Category:Measurement devices]]

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The Finn caliper (also called Finnish parabolic caliper) is used to measure the stem diameters at (or up to) 7 m (d7m). Figure 1 gives an illustration. By its name, it is originally from Finland and is being used in Northern European countries as well as in Germany and Switzerland. With pole and caliper, the height of 7 m has been found to be the maximum still manageable one; that is, it had been defined for practical reasons only.

Figure 1 The Finn caliper: fixed on a pole the tree diameter can be read up to a height of 7m (Keller 2005[1]).

The Finn caliper is relatively difficult to carry in the forest because the device consists of several calipers and various poles that are put together for the measurement.

[edit] References

  1. Keller M. (ed.). 2005. Schweizerisches Landesforstinventar. Anleitung für die Feldaufnahmen der Erhebung 2004-2007

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