aerial.survey: Simulated bowhead whale aerial survey dataset.

In david-borchers/hmltm: Line transect estimation with hidden Markov availability models

Simulated bowhead whale aerial survey dataset.

Description

Simulated data representing an aerial survey of bowhead whales from an aircraft flying at 46.3 m/s. These data can used together with the dataset bowhead.hmm.pars to estimate bowhead whale abundance.

Usage

aerial.survey

Format

An mrds data frame (with 2 rows per detection) with 86 observations on the following 11 variables.

stratum:

stratum number (a numeric vector).

area:

stratum surface area (a numeric vector).

transect:

transect number (a numeric vector).

L:

transect length (a numeric vector).

size:

size of each detected group (NA if no detection).

object:

unique identifier for each detection (a numeric vector; NA if no detection).

side:

the side of the plane from which each detection was made (NA if no detection).

obs:

the observer who made each detection (NA if no detection).

bf:

Beaufort sea state at the time of each detection (NA if no detection).

x:

perpendicular distances to detections (NA if no detection).

y:

perpendicular distances to detections (NA if no detection).

Source

Simulated

Examples

 data(aerial.survey)

david-borchers/hmltm documentation built on Oct. 29, 2023, 9:07 p.m.