Wedge prism
From AWF-Wiki
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==Applications== | ==Applications== | ||
* [[Bitterlich sampling]] | * [[Bitterlich sampling]] | ||
| − | * [[ | + | * [[angle count sample]] |
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==Related articles== | ==Related articles== | ||
* [[Bitterlich sampling]] | * [[Bitterlich sampling]] | ||
[[category:Measurement devices]] | [[category:Measurement devices]] | ||
Revision as of 10:08, 28 June 2012
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This section is still under construction! This article was last modified on 06/28/2012. If you have comments please use the Discussion page or contribute to the article! |
Contents |
General description
The wedge prism is a small honed glass plate that is used to make an angle count sample. You can estimate basal area factors of ½, 1, 2 or 4. The observer can do an angle count sample while he moves around the prism – and the prism is still located at the centre point of the plot.
Handling
- Select the point for angle count sample.
- Select starting point (tree) for the sample.
- Move around the prism counting the trees included in the sample till starting point is reached.
Tree is included in the sample
Tree is not included in the sample
| Advantages | Disadvantages |
|---|---|
| independence of power sources (no batteries needed) | no digital storage of measurement results available. |
