station: Sampling Station Numbering

In TobieSurette/gulf.data: Southern Gulf of St Lawrence Data Access

Sampling Station Numbering

Description

Functions to extract or determine trawl sampling station identification numbers. A sampling station is to be interpreted as a particular location, e.g. if two tows share a station number they can be considered as having been sampled in the same location. Station numbers can be assigned or determined based on spatial proximity.

Usage

station(x, ...)

## S3 method for class 'gulf.set'
station(
  x,
  method = "observed",
  distance.tolerance = 2,
  time.tolerance = 10,
  ...
)

Arguments

x	Data object.
...	Other arguments (not used).
method	Character string specifying the method to determine the station number. Options are ‘observed’ and ‘calculated’.
distance.tolerance	Distance (in kilometers) below which a pair of points is considered to belong to the same sampling station.
time.tolerance	Numeric value specifying the time-difference below which a pair of points is considered to have occured at the same time.

Methods (by class)

• station(gulf.set): Return survey sampling station identifier.

TobieSurette/gulf.data documentation built on Jan. 19, 2025, 7:50 p.m.