PBSmapping (version 2.72.1)

towData: Data: Tow Information from Longspine Thornyhead Survey

Description

PolyData of tow information for a longspine thornyhead survey (2001).

Usage

data(towData)

Format

Data frame consisting of 8 columns: PID = primary polygon ID, POS = position of each vertex within a given polygon, X = longitude coordinate, Y = latitude coordinate, depth = fishing depth (m), effort = tow effort (minutes), distance = tow track distance (km), catch = catch of longspine thornyhead (kg), and year = year of survey. Attributes: projection = "LL", zone = 9.

References

Starr, P.J., Krishka, B.A. and Choromanski, E.M. (2002) Trawl survey for thornyhead biomass estimation off the west coast of Vancouver Island, September 15 - October 2, 2001. Canadian Technical Report of Fisheries and Aquatic Sciences 2421, 60 pp.

See Also

makeProps, PolyData, towTracks.