Description

Bathymetry data spanning British Columbia's coast.

Usage

Format

Three-element list: x = vector of horizontal grid line locations, y = vector of vertical grid line locations, z = (x by y) matrix containing water depths measured in meters. Positive values indicate distance below sea level and negative values above it.

The functions 'graphics::contour' and 'grDevices::contourLines' expect data in this format. Function convCP converts the output from 'grDevices::contourLines' into a PolySet.

Note

In R, the data must be loaded using the 'utils::data' function.

Author(s)

Nicholas M. Boers, Associate Professor – Computer Science
MacEwan University, Edmonton AB

Maintainer: Rowan Haigh, Program Head – Offshore Rockfish
Pacific Biological Station (PBS), Fisheries & Oceans Canada (DFO), Nanaimo BC
locus opus: Institute of Ocean Sciences (IOS), Sidney BC
Last modified Rd: 2021-01-11

Source

Bathymetry data acquired from the Scripps Institution of Oceanography at the University of San Diego.

Using their online form, we requested bathymetry data for the complete nepacLL region. At forty megabytes, the data were not suitable for distribution in our mapping package. Therefore, we reduced the data to the range -140 <= x <= -122 degrees and 47 <= y <= 61 degrees.

References

Smith, W.H.F. and Sandwell, D.T. (1997) Global seafloor topography from satellite altimetry and ship depth soundings. Science 277, 1957-1962.
Website: https://topex.ucsd.edu/WWW_html/mar_topo.html

See Also

In package graphics:
contour
In package grDevices:
contourLines
In package PBSmapping:
convCP, nepacLL, nepacLLhigh