R: Global Topographic Dataset at Half-degree Resolution

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.

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)

[Package oce version 0.9-20 Index]