Forest Inventory Glossary
From AWF-Wiki
| Content A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
A
- Areal sampling frame
- The sampling frame or continuum (area) from which dimensionless samples points are selected.
B
C
- Cluster plot
- Sample plot that is composed of unconnected sub plots.As the subplots are not selected independently, a cluster gives only one observation.
D
- DBH
- Diameter at breast height (1.3 meter).
E
- Expansion factor
- Reciprocal of the inclusion probability. The factor with which observations have to be multiplied to derive an estimate of the total (or per hectare).
F
G
H
I
- Inclusion probability
- Probability that a single population unit is included in a sample based on the actual plot design.
J
K
L
M
N
O
P
R
S
- Sample plot
- A certain area or "decision rule", defining which population units are to be included at each sample point.
- Sampling intensity
- Proportion of the population that is been sampled. In forest inventories the area proportion that was observed in the sampling study (e.g. 3% of the total area).
- Sample size
- Number of samples drawn from a defined sample frame.
- Selection probability
- Probability that a unique set of k population units is selected as sample based on the actual plot design. In case that k=1 similar to the inclusion probability.
- Spatial autocorrelation
- Or: "Self-correlation" describes the relationship between two observations of the same variable, taken at two different objects or times.
- Standard Error
- Standarddeviation of the sample means.
T
- Total
- Aggregate value (or function thereof) of the quantitative characteristic of interest in the entire population (e.g. total volume/area).
