cation.
It returns <code>true</code> if a change is made and
<code>false</code> if no change is made.
Only polygon objects will be affected though any object may be passed."
<a name="footmark-2" id="footmark-2" href="#foottext-2"><sup><small>*2</small></sup></a></dd>
<dt><a name="label-42" id="label-42"><code>shape.shape_id</code></a></dt><!-- RDLabel: "shape.shape_id" -->
<dd>
returns the number of record by which the shape is read from a shapefile.
Nil is returned if the shape is not read from file.</dd>
