oce (version 0.2-1)

topoWorld: Global topographic dataset at half-degree resolution

Description

Global topographic dataset at half-degree resolution, created by decimating the ETOPO5 dataset.

Usage

data(topoWorld)

source

The ETOPO5 dataset was downloaded in late 2009 from the NOAA website, and decimated from 1/12th degree resolution to 1/2 degree resolution as follows: library(oce) f <- file("etopo5.dat", "rb") nx <- 12 * 360 ny <- 12 * 180 d <- t(matrix(readBin(f, "integer", size=2, endian="big", n=nx*ny), byrow=TRUE, nrow=ny)) z <- d[seq(1, nx, by=6), seq(ny, 1, by=-6)] topoWorld <- as.topo(seq(0.25,359.75,1/2),seq(-89.75,89.75,1/2),z)

References

http://www.ngdc.noaa.gov/mgg/global/relief/ETOPO5/TOPO/ETOPO5/

See Also

Created with as.topo.

Examples

library(oce)
data(topoWorld)
plot(topoWorld, legend=NULL)