Bathymetry Data Spanning British Columbia's Coast

Description

Bathymetry data spanning British Columbia's coast.

Usage

data(bcBathymetry)

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.

contour and contourLines expect data in this format. convCP converts the output from contourLines into a PolySet.

Note

In R, the data must be loaded using the data function. In S, the data are loaded automatically on demand.

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 D. T. Sandwell, Global seafloor topography from satellite altimetry and ship depth soundings, Science, v. 277, p. 1957-1962, 26 Sept., 1997.
http://topex.ucsd.edu/WWW_html/mar_topo.html

See Also

contour, contourLines, convCP, nepacLL, nepacLLhigh.