Other things related to topo data:
<code><a href="sub-sub-topo-method.html">[[,topo-method</a></code>,
<code>[[&lt;-,topo-method</code>,
<code><a href="as.topo.html">as.topo</a>()</code>,
<code><a href="download.topo.html">download.topo</a>()</code>,
<code><a href="plot-topo-method.html">plot,topo-method</a></code>,
<code><a href="read.topo.html">read.topo</a>()</code>,
<code><a href="subset-topo-method.html">subset,topo-method</a></code>,
<code><a href="summary-topo-method.html">summary,topo-method</a></co