MEDITS: dd.distance – R documentation

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dd.distance

Estimation of haul distance

Description

Function to estimate the hauls length using TA (table A, hauls data) with coordinates in the decimal degrees format (dd.ddd). The distances could be returned expressed in meters, kilometers and nautical miles.

Usage

dd.distance(data, unit = "m", verbose=TRUE)

Arguments

`data`	data frame of the hauls data (TA, table A)
`unit`	string value indicating the measure unit of the distance. Allowed values: "m" for meters, "km" for kilometers and "NM" for nautical miles.
`verbose`	give verbose output reporting in the output the selected measure unit of the distance.

Details

The TA file should be populated with coordinates in dicimal degrees format.

Value

The function returns the vector of the distances expressed in the selected measure unit.

Author(s)

Walter Zupa

Examples

TA.dd <- MEDITS.to.dd(TA)
dd.distance(TA.dd, unit="km", verbose=FALSE)

MEDITS

Analysis of MEDITS-Like Survey Data

v0.1.7

GPL-3

Authors

Walter Zupa, Loredana Casciaro, Isabella Bitetto, Maria Teresa Spedicato

Initial release