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    <UserStyle>
    <!-- Styles can have names, titles and abstracts -->
      <Title>Stacked Point</Title>
      <Abstract>Styles volcanoes using stacked points</Abstract>
      <FeatureTypeStyle>
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            <ogc:Function name="parameter">
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            <ogc:Function name="parameter">
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                <WellKnownName>triangle</WellKnownName>
                <Fill>
                  <CssParameter name="fill">#FF0000</CssParameter>
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              </Mark>
              <Size>8</Size>
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          </PointSymbolizer>
        </Rule>
        <Rule>
          <Name>rule29</Name>
          <Title>2-9 Volcanoes</Title>
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              <Size>14</Size>
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              <CssParameter name="font-weight">bold</CssParameter>
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                <Fill>
                  <CssParameter name="fill">#AA0000</CssParameter>
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              </Mark>
              <Size>22</Size>
            </Graphic>
          </PointSymbolizer>
          <TextSymbolizer>
            <Label>
              <ogc:PropertyName>count</ogc:PropertyName>
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            <Font>
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              <CssParameter name="font-size">12</CssParameter>
              <CssParameter name="font-weight">bold</CssParameter>
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               <Radius>2</Radius>
               <Fill>
                 <CssParameter name="fill">#AA0000</CssParameter>
                 <CssParameter name="fill-opacity">0.9</CssParameter>
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