【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
