R: Data: Bathymetry Spanning British Columbia's Coast
bcBathymetry
R Documentation
Data: Bathymetry 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.
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. Science277,
1957–1962. http://topex.ucsd.edu/WWW_html/mar_topo.html