topoWorld {oce} | R Documentation |
Global topographic dataset at half-degree resolution, created by decimating the ETOPO5 dataset. Its longitude ranges from -179.5 to 180, and its latitude ranges from -89.5 to 90. Height is measured in metres above nominal sea level.
data(topoWorld)
The coarse resolution can be a problem in plotting depth contours along
with coastlines in regions of steep topography. For example, near the
southeast corner of Newfoundland, a 200m contour will overlap a coastline
drawn with coastlineWorldFine
. The solution in such
cases is to download a higher-resolution topography file and create a
topo
object with read.topo
or as.topo
.
Dan Kelley
The binary ETOPO5 dataset was downloaded in late 2009 from the NOAA website, http://www.ngdc.noaa.gov/mgg/global/relief/ETOPO5/TOPO/ETOPO5/, decoded, decimated from 1/12th degree resolution to 1/2 degree resolution, and shifted so that longitude runs from negative to positive instead of from 0 to 360.
Created with as.topo
.
## Not run: library(oce) data(topoWorld) par(mfrow=c(2,1)) plot(topoWorld, location=NULL) imagep(topoWorld) ## End(Not run)