\HeaderA{volcano}{Topographic Information on Auckland's Maunga Whau Volcano}{volcano}
\keyword{datasets}{volcano}
\begin{Description}\relax
Maunga Whau (Mt Eden) is one of about 50 volcanos in the Auckland
volcanic field.  This data set gives topographic information for
Maunga Whau on a 10m by 10m grid.
\end{Description}
\begin{Usage}
\begin{verbatim}volcano\end{verbatim}
\end{Usage}
\begin{Format}\relax
A matrix with 87 rows and 61 columns, rows corresponding to grid lines
running east to west and columns to grid lines running south to
north.
\end{Format}
\begin{Source}\relax
Digitized from a topographic map by Ross Ihaka.
These data should not be regarded as accurate.
\end{Source}
\begin{SeeAlso}\relax
\code{\LinkA{filled.contour}{filled.contour}} for a nice plot.
\end{SeeAlso}
\begin{Examples}
\begin{ExampleCode}
require(graphics)
filled.contour(volcano, color = terrain.colors, asp = 1)
title(main = "volcano data: filled contour map")
\end{ExampleCode}
\end{Examples}