topoWorld {oce} | R Documentation

## 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.

### Usage

    data(topoWorld)

### Details

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`.

### Author(s)

Dan Kelley

### 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/, 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.

### See Also

Created with `as.topo`.

### Examples

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

    ## End(Not run)

[Package oce version 0.9-18 Index]