> Subcategory taxonomy provides a series of pick lists for Protocol authors. After selecting a Subcategory, authors then enter a title for their specific Metric or Indicator.

All sites in the study area are sampled.

Only sites within a part of the study area are sampled.

Selection of sites is based on the need to estimate parameters or coefficients of a model that will be used to make the population estimates.

Selection of sites in part of the study area is guided by the candidate model, and locations in other parts are selected by other methods.

A random sample of specified size is drawn from each stratum of a population. Each individual is chosen entirely by chance and each member has a known, but possibly unequal, chance of being chosen.

A random sample of specified size is drawn from the population. Each individual is chosen entirely by chance and each member has an equal chance of being chosen.

A random sample that selects members of the population at regular intervals, starting with a randomly chosen member.

taxonomy provides a series of pick lists for Protocol authors. After selecting a Subcategory, authors then enter a title for their specific Metric or Indicator.

> Category -> Subcategory taxonomy provides a series of pick lists for Protocol authors. After selecting a Subcategory, authors then enter a title for their specific Metric or Indicator.