SLD 官方实例

基于xml标准的sld格式：

<?xml version="1.0" encoding="UTF-8"?>

<StyledLayerDescriptor version="1.0.0"

  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"

  xsi:schemaLocation="http://www.opengis.net/sld

  http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd">

  <NamedLayer>

    <Name>country_bounds</Name>

    <UserStyle>

      <Title>xxx</Title>

      <FeatureTypeStyle>

        <Rule>

          <LineSymbolizer>

            <Geometry>

              <ogc:PropertyName>center-line</ogc:PropertyName>

            </Geometry>

            <Stroke>

              <CssParameter name="stroke">#0000ff</CssParameter>

            </Stroke>

          </LineSymbolizer>

        </Rule>

      </FeatureTypeStyle>

    </UserStyle>

  </NamedLayer>

</StyledLayerDescriptor>

注：encoding="UTF-8"改成encoding="GB2312"支持中文

1.PointSymbolizer

Example:

<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>

2.LineSymbolizer

Basic Example:

<LineSymbolizer>

    <Stroke>

      <CssParameter name="stroke">#0000FF</CssParameter>

      <CssParameter name="stroke-width">3</CssParameter>

      <CssParameter name="stroke-dasharray">5 2</CssParameter>

    </Stroke>

 </LineSymbolizer>

Offsetting lines:

<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>

Offsetting polygons:

<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>

3.PolygonSymbolizer

Example:

<PolygonSymbolizer>

    <Fill>

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

     </Fill>

</PolygonSymbolizer>

4.TextSymbolizer

Example:

<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>

Scalable Font Size:

<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>

6.Geometry

Extracting vertices:

<PointSymbolizer>

     <Geometry>

       <ogc:Function name="vertices">

          <ogc:PropertyName>the_geom</ogc:PropertyName>

       </ogc:Function>

     </Geometry>

     <Graphic>

       <Mark>

         <WellKnownName>square</WellKnownName>

         <Fill>

           <CssParameter name="fill">#FF0000</CssParameter>

         </Fill>

       </Mark>

       <Size>6</Size>

     </Graphic>

</PointSymbolizer>

Start and end point:

<PointSymbolizer>

  <Geometry>

    <ogc:Function name="startPoint">

      <ogc:PropertyName>the_geom</ogc:PropertyName>

    </ogc:Function>

  </Geometry>

  <Graphic>

    <Mark>

      <WellKnownName>square</WellKnownName>

      <Stroke>

        <CssParameter name="stroke">0x00FF00</CssParameter>

        <CssParameter name="stroke-width">1.5</CssParameter>

      </Stroke>

    </Mark>

    <Size>8</Size>

  </Graphic>

 </PointSymbolizer>

 <PointSymbolizer>

   <Geometry>

     <ogc:Function name="endPoint">

       <ogc:PropertyName>the_geom</ogc:PropertyName>

     </ogc:Function>

   </Geometry>

   <Graphic>

     <Mark>

       <WellKnownName>circle</WellKnownName>

       <Fill>

          <CssParameter name="fill">0xFF0000</CssParameter>

       </Fill>

     </Mark>

     <Size>4</Size>

   </Graphic>

 </PointSymbolizer>

Drop shadow:

<PolygonSymbolizer>

    <Geometry>

       <ogc:Function name="offset">

          <ogc:PropertyName>the_geom</ogc:PropertyName>

          <ogc:Literal>0.00004</ogc:Literal>

          <ogc:Literal>-0.00004</ogc:Literal>

       </ogc:Function>

    </Geometry>

    <Fill>

      <CssParameter name="fill">#555555</CssParameter>

    </Fill>

</PolygonSymbolizer>

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