de> is to speed processing on large datasets, and to remove
spatial bias (e.g. with a single station that is repeated frequently in an
otherwise seldom-sampled region).  A form of pregridding is done in the
World Ocean Atlas, for example.</p></dd>


<dt id="arg-debug">debug<a class="anchor" aria-label="anchor" href="#arg-debug"></a></dt>
<dd><p>a flag that turns on debugging.  Set to 0 for no debugging
information, to 1 for more, etc; the value is reduced by 1 for each
descendent function call.</p></dd>

</