oce (version 0.9-20)

topoWorld: Global Topographic Dataset at Half-degree Resolution

Description

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.

Usage

data(topoWorld)

Source

The binary ETOPO5 dataset was downloaded in late 2009 from the NOAA website, http://www.ngdc.noaa.gov/mgg/global/relief/ETOPO5/TOPO/ETOPO5 (link last checked 2016-06-12), 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.

See Also

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

Examples

## Not run: 
# library(oce)
# data(topoWorld) 
# par(mfrow=c(2,1))
# plot(topoWorld, location=NULL)
# imagep(topoWorld)
# ## End(Not run)