geoserver中SLD样式 点 随比例尺缩放而变化

在小付同学的帮助下，完成了SLD样式中点随着比例尺缩放而变化的效果。

涉及的主要是三个属性，MAXSCALEDENOMINATOR,MINSCALEDENOMINATOR和SCALE。

另外，点的样式<WellKnownName>triangle</WellKnownName>，可以有circle，square，triangle，cross，X，star，等其他。

实现的整个点样式具体如下

<?xml version="1.0" encoding="ISO-8859-1"?>
<StyledLayerDescriptor version="1.0.0"
    xsi:schemaLocation="http://www.opengis.net/sld StyledLayerDescriptor.xsd"
    xmlns="http://www.opengis.net/sld"
    xmlns:ogc="http://www.opengis.net/ogc"
    xmlns:xlink="http://www.w3.org/1999/xlink"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<NamedLayer>
    <Name>Simple point</Name>
    <UserStyle>
      <Title>GeoServer SLD Cook Book: Simple point</Title>
      <FeatureTypeStyle>
      <Rule>
         <MaxScaleDenominator>200000</MaxScaleDenominator>
          <MinScaleDenominator>150000</MinScaleDenominator> 
          <PointSymbolizer>
            <Graphic>
              <Mark>
                <WellKnownName>triangle</WellKnownName>
                  <Fill>
                  <CssParameter name="fill">#FF0000</CssParameter>
                </Fill>
              </Mark>
              <Size>4</Size>
            </Graphic>
          </PointSymbolizer>
        </Rule>
        <Rule>
         <MaxScaleDenominator>150000</MaxScaleDenominator>
          <MinScaleDenominator>100000</MinScaleDenominator> 
          <PointSymbolizer>
            <Graphic>
              <Mark>
                <WellKnownName>triangle</WellKnownName>
                  <Fill>
                  <CssParameter name="fill">#FF0000</CssParameter>
                </Fill>
              </Mark>
              <Size>6</Size>
            </Graphic>
          </PointSymbolizer>
        </Rule>
        <Rule>
         <MaxScaleDenominator>100000</MaxScaleDenominator>
          <MinScaleDenominator>50000</MinScaleDenominator> 
          <PointSymbolizer>
            <Graphic>
              <Mark>
                <WellKnownName>triangle</WellKnownName>
                  <Fill>
                  <CssParameter name="fill">#FF0000</CssParameter>
                </Fill>
              </Mark>
              <Size>8</Size>
            </Graphic>
          </PointSymbolizer>
        </Rule>
      <Rule>
         <MaxScaleDenominator>50000</MaxScaleDenominator>
          <MinScaleDenominator>10000</MinScaleDenominator> 
          <PointSymbolizer>
            <Graphic>
              <Mark>
                <WellKnownName>triangle</WellKnownName>
                  <Fill>
                  <CssParameter name="fill">#FF0000</CssParameter>
                </Fill>
              </Mark>
              <Size>10</Size>
            </Graphic>
          </PointSymbolizer>
        </Rule>
         <Rule>
         <MaxScaleDenominator>10000</MaxScaleDenominator>
          <MinScaleDenominator>5000</MinScaleDenominator> 
          <PointSymbolizer>
            <Graphic>
              <Mark>
                <WellKnownName>triangle</WellKnownName>
                  <Fill>
                  <CssParameter name="fill">#FF0000</CssParameter>
                </Fill>
              </Mark>
              <Size>12</Size>
            </Graphic>
          </PointSymbolizer>
        </Rule>
       <Rule>
         <MaxScaleDenominator>5000</MaxScaleDenominator>
          <MinScaleDenominator>1000</MinScaleDenominator> 
          <PointSymbolizer>
            <Graphic>
              <Mark>
                <WellKnownName>triangle</WellKnownName>
                  <Fill>
                  <CssParameter name="fill">#FF0000</CssParameter>
                </Fill>
              </Mark>
              <Size>14</Size>
            </Graphic>
          </PointSymbolizer>
        </Rule>
      </FeatureTypeStyle>
    </UserStyle>
</NamedLayer>
</StyledLayerDescriptor>