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.
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
.
data(topoWorld)
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
passed through matrixShiftLongitude
so that longitude is
between -180 and 180 degrees.
Other datasets provided with oce
: adp
,
adv
, argo
, cm
,
coastlineWorld
, colors
,
ctdRaw
, ctd
,
echosounder
, landsat
,
lisst
, lobo
,
met
, rsk
,
sealevelTuktoyaktuk
,
sealevel
, section
,
wind
Other things related to topo
data: [[,topo-method
,
[[<-,topo-method
, as.topo
,
download.topo
,
plot,topo-method
, read.topo
,
subset,topo-method
,
summary,topo-method
,
topo-class
, topoInterpolate
## Not run: library(oce) data(topoWorld) par(mfrow=c(2, 1)) plot(topoWorld, location=NULL) imagep(topoWorld) ## End(Not run)