dot-calc function

Calculate Things

Calculate distance and/or orientation.

.calcDist(polys)
.calcOrientation(polys)

Arguments

• polys: data.frame -- valid PolySet with 'projection' attribute

Details

.calcdist : Equatorial radius 6,378.14 km; Polar radius 6,356.78 km; Mean radius 6,371.3 km

.calcOrientation : Calls C code 'calcOrientation' using .C().

Returns

.calcdist : distance vector (distances between each point)

.calcOrientation : data frame with 'orientation' column (-1 when counter-clockwise; 0 when N/A; +1 when clockwise) or NULL if no rows in output

Author(s)

Nicholas M. Boers, Software Engineer, Jobber, Edmonton AB

Maintainer: Rowan Haigh, Program Head -- Offshore Rockfish

Pacific Biological Station (PBS), Fisheries & Oceans Canada (DFO), Nanaimo BC

locus opus: Remote office, Vancouver BC

Last modified Rd: 2024-09-03

See Also

In package PBSmapping:

calcLength, placeHoles, thickenPolys