Forest Inventory Glossary

Revision as of 13:41, 24 March 2011

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.

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

U

V

W

X