<?xml version="1.0" encoding="utf-8" ?>
<ogr:FeatureCollection
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://ogr.maptools.org/ surface_vol_below.xsd"
     xmlns:ogr="http://ogr.maptools.org/"
     xmlns:gml="http://www.opengis.net/gml">
  <gml:boundedBy><gml:null>missing</gml:null></gml:boundedBy>
                                                                                                                                                                                                                                                                                                
  <gml:featureMember>
    <ogr:surface_vol_below fid="surface_vol_below.0">
      <ogr:volume>-0.00322225</ogr:volume>
      <ogr:deg2>0.00034600</ogr:deg2>
      <ogr:pixel_count>34600</ogr:pixel_count>
    </ogr:surface_vol_below>
  </gml:featureMember>
</ogr:FeatureCollection>