<h3>bounds_width function</h3>
Returns the width of the bounding box of a geometry. Calculations are in the Spatial Reference System of this Geometry. 

<h4>Syntax</h4>
<pre>bounds_width(geom)</pre>

<h4>Arguments</h4>
geom &rarr; a geometry

<h4>Example</h4>
<pre> bounds_width($geometry) &rarr; returns width of bounding box of $geometry</pre>