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...ators" in ecological literature. Also two dimensional lines can be used as observation units (see [[line sampling]]). All in all, the response design describes wh

...we define a certain area that is the [[Plot design|sample plot]] where the observation one makes on this area is assigned to the respective point.

...ssion of the [[inclusion probability|selection probability]] for a certain observation. ...are related to a certain combination of included trees and/or to a certain observation that can be made on this mutually exclusive set. By populating all single t

...hat could be estimated based on one dimensional [[line sampling|lines]] as observation units!

...titutes therefore one independent observation. This one single independent observation cannot be subdivided into more independent observations; it is just one. Th At each one of the four sub-plots (points) the observation “1” (forest) or “0” (non-forest) is made so that for an entire clus

Since early instruments of Earth Observation, such as NASA’s ERTS and NOAA’s

...set (cluster) of sampling elements; thus, a cluster consists of a group of observation units, which together form a sampling unit (Kleinn 2007<ref name="kleinn200 ... randomization (selection of the first screw) had been done to select this observation unit of 6. In fact, most basic [[:Category:Plot design|plot designs]] as us

...g-August-Universität Göttingen. 164 S.</ref>). Nothing else. Outside the observation plot we pretend to be blind; and so we do on the some times long way to the In adaptive cluster sampling, ''each network'' is viewed as one independent observation. Each network can, therefore, be viewed as a one cluster, where the cluster

... defined. This is also directly understandable by common sense: one single observation does not contain any information about the variability that is present in t ...he systematic sample as a sample in which the sub-plots are considered the observation plots.

...gn]]: observation of an ancillary variable on each plot in addition to the observation of the target variable. ...lary variable, this is certainly true; if plot area is zero, then also the observation of number of stems or basal area is zero. However, if the relationship betw

...ession|regression]]. The second phase sample is usually small because the observation of Y is usually more expensive, difficult and time consuming. Then, the ob

...ample plots]] (two-dimensional observation units) or points (dimensionless observation units). Line sampling does not refer to the so-called transects which usual Depending on the dimensionality of the observation units, different types of observations can be made on them. There are three

...hen, the true parametric total would be estimated perfectly by each single observation <math>y_i</math><ref name="kleinn2007">Kleinn, C. 2007. Lecture Notes for

Here, each observation <math>y_i</math> is weighted by the inverse of its selection probability <m

...asal area]]; the sample tree values are then combined to one sample point observation by weighting them according to their individual inclusion probabilities. F

... factor that we need to expand the per-plot observation to the per-hectare observation. Now, let’s expand this per-plot observation to a per-hectare figure (referring to trees with ''dbh'' <math>d_i</math> o

...ry is based on the selection of sample points and not trees. Afterwards an observation is derived by including trees at which we take the measurements (normally t ...l sampling frame in mutually exclusive polygons, each related to a certain observation at this locus of points. This approach is very suitable if the performance

...cover, but we need also to define reference area on which the crown cover observation is to be taken. It is interesting to observe, however, that only in some f

... the whole [[Stem volume#The taper curve|taper curve]] is modeled from the observation of species, ''dbh'' and diameter at 7 m.

...ee biomass is a variable that cannot be measured directly so that also the observation of individual tree biomass is usually sample based. Therefore any estimatio