SLD 官方实例

<PointSymbolizer>
   <Graphic>
     <Mark>
       <WellKnownName>circle</WellKnownName>
       <Fill>
         <CssParameter name="fill">#FF0000</CssParameter>
       </Fill>
     </Mark>
     <Size>6</Size>
   </Graphic>
 </PointSymbolizer>

<PointSymbolizer>
   <Graphic>
     <ExternalGraphic>
       <OnlineResource xlink:type="simple"
                       xlink:href="file:///var/www/htdocs/sun.png" />
       <Format>image.png</Format>
     </ExternalGraphic>
   </Graphic>
 </PointSymbolizer>

<LineSymbolizer>
    <Stroke>
      <CssParameter name="stroke">#0000FF</CssParameter>
      <CssParameter name="stroke-width">3</CssParameter>
      <CssParameter name="stroke-dasharray">5 2</CssParameter>
    </Stroke>
 </LineSymbolizer>

<LineSymbolizer>
    <Stroke>
         <CssParameter name="stroke">#000000</CssParameter>
         <CssParameter name="stroke-width">2</CssParameter>
    </Stroke>
</LineSymbolizer>
<LineSymbolizer>
    <Stroke>
         <CssParameter name="stroke">#0000FF</CssParameter>
         <CssParameter name="stroke-width">3</CssParameter>
         <CssParameter name="stroke-dasharray">5 2</CssParameter>
     </Stroke>
     <PerpendicularOffset>3</PerpendicularOffset>
</LineSymbolizer>

<PolygonSymbolizer>
    <Stroke>
       <CssParameter name="stroke">#000000</CssParameter>
       <CssParameter name="stroke-width">2</CssParameter>
    </Stroke>
</PolygonSymbolizer>
<LineSymbolizer>
    <Stroke>
       <CssParameter name="stroke">#AAAAAA</CssParameter>
       <CssParameter name="stroke-width">3</CssParameter>
    </Stroke>
    <PerpendicularOffset>-2</PerpendicularOffset>
</LineSymbolizer>

<PolygonSymbolizer>
    <Fill>
         <CssParameter name="fill">#000080</CssParameter>
     </Fill>
</PolygonSymbolizer>

<TextSymbolizer>
         <Label>
           <ogc:PropertyName>name</ogc:PropertyName>
         </Label>
         <Font>
           <CssParameter name="font-family">Arial</CssParameter>
           <CssParameter name="font-size">12</CssParameter>
           <CssParameter name="font-style">normal</CssParameter>
           <CssParameter name="font-weight">bold</CssParameter>
         </Font>
         <LabelPlacement>
           <PointPlacement>
             <AnchorPoint>
               <AnchorPointX>0.5</AnchorPointX>
               <AnchorPointY>0.0</AnchorPointY>
             </AnchorPoint>
             <Displacement>
               <DisplacementX>0</DisplacementX>
               <DisplacementY>25</DisplacementY>
             </Displacement>
             <Rotation>-45</Rotation>
           </PointPlacement>
         </LabelPlacement>
         <Fill>
           <CssParameter name="fill">#990099</CssParameter>
         </Fill>
</TextSymbolizer>

<CssParameter name="font-size">
         <ogc:Function name="Categorize">
           <!-- Value to transform -->
           <ogc:Function name="env">
             <ogc:Literal>wms_scale_denominator</ogc:Literal>
           </ogc:Function>
           <!-- Output values and thresholds -->
           <!-- Ranges: -->
           <!-- [scale <= 300, font 12] -->
           <!-- [scale 300 - 2500, font 10] -->
           <!-- [scale > 2500, font 8] -->
           <ogc:Literal>12</ogc:Literal>
           <ogc:Literal>300</ogc:Literal>
           <ogc:Literal>10</ogc:Literal>
           <ogc:Literal>2500</ogc:Literal>
           <ogc:Literal>8</ogc:Literal>
         </ogc:Function>
</CssParameter>