Bilinear interpolation is used so that values will vary smoothly within a longitude-latitude grid cell. Note that the sign convention for longitude and latitude must match that in topo.

topoInterpolate(longitude, latitude, topo)

Arguments

longitude Vector of longitudes (in the same sign convention as used in topo). Vector of latitudes (in the same sign convention as used in topo). A topo object.

Value

Vector of heights giving the elevation of the earth above means sea level at the indicated location on the earth.

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, topoWorld
library(oce)