geoserver点聚合样式sld

【第六章 WebGIS】geoserver生成点聚合效果 - 知乎

需要WPS插件，注意版本要对应 GeoServer，加压缩后的jar包放到geoserver的lib目录下，重启geoserver。

原始默认样式

聚合sld样式

<?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>g_stacker</Name>
    <UserStyle>
      <Title>Point Stacker</Title>
      <Abstract>A sample style that aggregates points</Abstract>
      <FeatureTypeStyle>
        <Transformation>
          <ogc:Function name="gs:PointStacker">
            <ogc:Function name="parameter">
              <ogc:Literal>data</ogc:Literal>       
            </ogc:Function>
            <ogc:Function name="parameter">
              <ogc:Literal>cellSize</ogc:Literal>
              <ogc:Literal>30</ogc:Literal>        <!--聚合半径-->
            </ogc:Function>
            <ogc:Function name="parameter">
              <ogc:Literal>outputBBOX</ogc:Literal>
              <ogc:Function name="env">
                <ogc:Literal>wms_bbox</ogc:Literal>
              </ogc:Function>
            </ogc:Function>
            <ogc:Function name="parameter">
              <ogc:Literal>outputWidth</ogc:Literal>
              <ogc:Function name="env">
                <ogc:Literal>wms_width</ogc:Literal>
              </ogc:Function>
            </ogc:Function>
            <ogc:Function name="parameter">
              <ogc:Literal>outputHeight</ogc:Literal>
              <ogc:Function name="env">
                <ogc:Literal>wms_height</ogc:Literal>
              </ogc:Function>
            </ogc:Function>
          </ogc:Function>
        </Transformation>
        <Rule>
          <PointSymbolizer>
            <Graphic>
              <Mark>
                <WellKnownName>circle</WellKnownName>
                <Fill>
                  <CssParameter name="fill">#0000FF</CssParameter>
                  <CssParameter name="fill-opacity">0.5</CssParameter>
                </Fill>
              </Mark>
              <Size>25</Size>
            </Graphic>
          </PointSymbolizer>
          <TextSymbolizer>
            <Label>
              <ogc:PropertyName>countunique</ogc:PropertyName>
            </Label>
            <Font>
              <CssParameter name="font-family">Arial</CssParameter>
              <CssParameter name="font-size">12.0</CssParameter>
              <CssParameter name="font-style">normal</CssParameter>
              <CssParameter name="font-weight">normal</CssParameter>
            </Font>
            <LabelPlacement>
              <PointPlacement>
                <AnchorPoint>
                  <AnchorPointX>0.5</AnchorPointX> 
                  <AnchorPointY>0.5</AnchorPointY>
                </AnchorPoint>
                <Displacement>
                    <DisplacementX>0</DisplacementX>
                    <DisplacementY>0</DisplacementY>
                </Displacement>
                <Rotation>
                  <ogc:Literal>0.0</ogc:Literal>
                </Rotation>
              </PointPlacement>
            </LabelPlacement>   
            <Halo>
              <Radius>2</Radius>
              <Fill>
                <CssParameter name="fill">#FFFFFF</CssParameter>
              </Fill>
            </Halo>
            <Fill>
              <CssParameter name="fill">#000000</CssParameter>
            </Fill>
          </TextSymbolizer>
        </Rule>
      </FeatureTypeStyle>
    </UserStyle>
  </NamedLayer>
</StyledLayerDescriptor>

结果样式