<h3>disjoint function</h3>
Returns 1 if the geometries do not "spatially intersect" - if they do not share any space together. 

<h4>Syntax</h4>
<pre>disjoint( a, b )</pre>

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

<h4>Example</h4>
<pre> disjoint( geomFromWKT( 'POLYGON((0 0 , 0 1 , 1 1 , 1 0 , 0 0 ))' ) , geomFromWKT( 'LINESTRING(3 3 , 4 4 , 5 5)' )) &rarr; returns 1</pre>
<pre> disjoint( geomFromWKT( 'LINESTRING(3 3 , 4 4 , 5 5)' ) , geomFromWKT( 'POINT(4 4)' ))                              &rarr; returns 0</pre>