Returns the geometry of the smallest box in which the geometry passed as parameter fits. Normally it is a rectangle, but for a point the same point is obtained and for an horizontal or vertical line is obtained the line defined by its opposite points.

# 1 geo.getEnvelope

<geo.getEnvelope>    <geom_column /> *</geo.getEnvelope>
Example
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<select>
<columns>
<geo.getEnvelope>a.the_geom</geo.getEnvelope>,
<geo.getEnvelope>
<geo.polygon>
<coords>0 0,0 1,1 1,1 0,0 0</coords>
<srid>4326</srid>
</geo.polygon>
</geo.getEnvelope>
</columns>
<from table='roads'  alias='a'  />
</select>