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)
Value
The function returns the vector of the distances expressed in the selected measure unit.
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.
Author
Walter Zupa
Details
The TA file should be populated with coordinates in decimal degrees format.