Fiksēts parauglaukums
Use known parauglaukums platība and DBH lists to aprēķināt basal platība per platība and stem blīvums.
Aprēķināt basal platība, stem blīvums, and average DBH (QMD) from fixed parauglaukums and BAF angle-gauge surveys.
Keep DBH, BAF, and QMD in a shared forestry vocabulary while switching between metric / imperial and mm / cm / in.
Warnings
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| Koki | Pamatlaukums | Stumbru blīvums | Arithmetic mean DBH | QMD | |
|---|---|---|---|---|---|
| -- | |||||
Use known parauglaukums platība and DBH lists to aprēķināt basal platība per platība and stem blīvums.
Use in-koks DBH lists and BAF to novērtēt basal platība per platība and stem blīvums from punkts samples.
The primary average DBH is QMD, or quadratic mean diameter. Arithmetic mean DBH is shown as a secondary check when koks-level diameters are present.
The primary average shown by this tool is QMD. Arithmetic mean DBH is shown as a secondary check only when koks-level diameters are present.
Yes. With DBH values entered, the tool estimates stem blīvums from each in-koks's expansion factor.
Either is fine as long as you use one consistent measurement standard for the values you enter. The tool does not auto-correct augstums standards.
No. The tool only aggregates the numbers after lauks tallying.
Yes, but the URL can become long. Use JSON eksportēt and importēt for larger surveys.
Diameter at Breast Augstums. Koks diameter measured at breast augstums.
The cross-sectional platība of koks stems at breast augstums.
The number of koki per unit platība.
Quadratic Mean Diameter. An average DBH derived from basal platība and stem blīvums.
Basal Platība Factor. The factor used in angle-gauge surveys.
A tally method using a parauglaukums with a known platība.
koks basal platība = π × (DBH / 2)^2
basal platība per platība = Σ koks basal platība / sample platība
stem blīvums = koks count / sample platība
QMD = sqrt(4 × basal platība per platība / (π × stem blīvums))
BAF row basal platība = in-koks count × BAF
BAF row stem blīvums = Σ (BAF / koks basal platība)