Topographic data may be read with read.topo or assembled with
as.topo. Plotting are handled with plot,topo-method
and summaries with summary,topo-method. Data retrieval may be
done with [[,topo-method and replacement with
[[<-,topo-method. The key data, stored within the data slot,
are: longititude, latitude, and z.
Other classes provided by oce: adp-class,
adv-class, argo-class,
bremen-class, cm-class,
coastline-class, ctd-class,
echosounder-class,
lisst-class, lobo-class,
met-class, oce-class,
odf-class, rsk-class,
sealevel-class,
section-class, windrose-class
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,
topoInterpolate, topoWorld