Style Polygons in Geoserver
In this blog, we'll explore various ways to create styles for Polygon data. We'll be using SLD Format to write the styles. I would highly recommend to keep SLD Reference and Polygon Style cookbook handy.
PolygonSymbolizer allows users to write Polygon Specific styles.
Polygon Data Representation
<?xml version="1.0" encoding="ISO-8859-1"?>
<StyledLayerDescriptor version="1.0.0"
? xsi:schemaLocation="https://www.opengis.net/sld https://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd"
? xmlns="https://www.opengis.net/sld" xmlns:ogc="https://www.opengis.net/ogc"
? xmlns:xlink="https://www.w3.org/1999/xlink" xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance">
? <NamedLayer>
? ? <Name>coun</Name>
? ? <UserStyle>
? ? ? <Title>A dark orange polygon style</Title>
? ? ? <FeatureTypeStyle>
? ? ? ? <Rule>
? ? ? ? ? <Title>dark orange polygon</Title>
? ? ? ? ? <PolygonSymbolizer>
? ? ? ? ? ? <Fill>
? ? ? ? ? ? ? <CssParameter name="fill">#ff9900
? ? ? ? ? ? ? </CssParameter>
? ? ? ? ? ? </Fill>
? ? ? ? ? ? <Stroke>
? ? ? ? ? ? ? <CssParameter name="stroke">#000000</CssParameter>
? ? ? ? ? ? ? <CssParameter name="stroke-width">0.5</CssParameter>
? ? ? ? ? ? </Stroke>
? ? ? ? ? </PolygonSymbolizer>
? ? ? ? </Rule>
? ? ? </FeatureTypeStyle>
? ? </UserStyle>
? </NamedLayer>
</StyledLayerDescriptor>
Polygon Data with Graphic Symbol Fill
<?xml version="1.0" encoding="ISO-8859-1"?>
<StyledLayerDescriptor version="1.0.0"
? ? ? ? ? ? ? ? ? ? ? ?xsi:schemaLocation="https://www.opengis.net/sld https://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd"
? ? ? ? ? ? ? ? ? ? ? ?xmlns="https://www.opengis.net/sld" xmlns:ogc="https://www.opengis.net/ogc"
? ? ? ? ? ? ? ? ? ? ? ?xmlns:xlink="https://www.w3.org/1999/xlink" xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance">
? <NamedLayer>
? ? <Name>coun</Name>
? ? <UserStyle>
? ? ? <Title>A dark orange polygon style</Title>
? ? ? <FeatureTypeStyle>
? ? ? ? <Rule>
? ? ? ? ? <PolygonSymbolizer>
? ? ? ? ? ? <Fill>
? ? ? ? ? ? ? <GraphicFill>
? ? ? ? ? ? ? ? <Graphic>
? ? ? ? ? ? ? ? ? <Mark>
? ? ? ? ? ? ? ? ? ? <WellKnownName>shape://times</WellKnownName>
? ? ? ? ? ? ? ? ? ? <Stroke>
? ? ? ? ? ? ? ? ? ? ? <CssParameter name="stroke">#990099</CssParameter>
? ? ? ? ? ? ? ? ? ? ? <CssParameter name="stroke-width">2</CssParameter>
? ? ? ? ? ? ? ? ? ? </Stroke>
? ? ? ? ? ? ? ? ? </Mark>
? ? ? ? ? ? ? ? ? <Size>16</Size>
? ? ? ? ? ? ? ? </Graphic>
? ? ? ? ? ? ? </GraphicFill>
? ? ? ? ? ? </Fill>
? ? ? ? ? ? <Stroke>
? ? ? ? ? ? ? <CssParameter name="stroke">#f00</CssParameter>
? ? ? ? ? ? ? <CssParameter name="stroke-width">2</CssParameter>
? ? ? ? ? ? </Stroke>
? ? ? ? ? </PolygonSymbolizer>
? ? ? ? </Rule>
? ? ? </FeatureTypeStyle>
? ? </UserStyle>
? </NamedLayer>
</StyledLayerDescriptor>
Polygon Data with Attribute Conditions
<?xml version="1.0" encoding="ISO-8859-1"?>
<StyledLayerDescriptor version="1.0.0"
? ? ? ? ? ? ? ? ? ? ? ?xsi:schemaLocation="https://www.opengis.net/sld https://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd"
? ? ? ? ? ? ? ? ? ? ? ?xmlns="https://www.opengis.net/sld" xmlns:ogc="https://www.opengis.net/ogc"
? ? ? ? ? ? ? ? ? ? ? ?xmlns:xlink="https://www.w3.org/1999/xlink" xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance">
? <NamedLayer>
? ? <Name>road</Name>
? ? <UserStyle>
? ? ? <Title>A gold line style</Title>
? ? ? <FeatureTypeStyle>
? ? ? ? <Rule>
? ? ? ? ? <Title>Everything Else </Title>
? ? ? ? ? <PolygonSymbolizer>
? ? ? ? ? ? <Fill>
? ? ? ? ? ? ? <CssParameter name="fill">#f00</CssParameter>
? ? ? ? ? ? </Fill>
? ? ? ? ? </PolygonSymbolizer>
? ? ? ? </Rule>
? ? ? ? <Rule>
? ? ? ? ? <Title>Population > 90000000 </Title>
? ? ? ? ? <ogc:Filter>
? ? ? ? ? ? <ogc:PropertyIsGreaterThan>
? ? ? ? ? ? ? <ogc:PropertyName>POP_EST</ogc:PropertyName>
? ? ? ? ? ? ? <ogc:Literal>90000000</ogc:Literal>
? ? ? ? ? ? </ogc:PropertyIsGreaterThan>
? ? ? ? ? </ogc:Filter>
? ? ? ? ? <PolygonSymbolizer>
? ? ? ? ? ? <Fill>
? ? ? ? ? ? ? <CssParameter name="fill">#0f0</CssParameter>
? ? ? ? ? ? </Fill>
? ? ? ? ? </PolygonSymbolizer>
? ? ? ? </Rule>
? ? ? </FeatureTypeStyle>
? ? </UserStyle>
? </NamedLayer>
</StyledLayerDescriptor>
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Polygon Data with Zoom (Scale) Conditions
<?xml version="1.0" encoding="ISO-8859-1"?>
<StyledLayerDescriptor version="1.0.0"
? ? ? ? ? ? ? ? ? ? ? ?xsi:schemaLocation="https://www.opengis.net/sld https://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd"
? ? ? ? ? ? ? ? ? ? ? ?xmlns="https://www.opengis.net/sld" xmlns:ogc="https://www.opengis.net/ogc"
? ? ? ? ? ? ? ? ? ? ? ?xmlns:xlink="https://www.w3.org/1999/xlink" xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance">
? <NamedLayer>
? ? <Name>road</Name>
? ? <UserStyle>
? ? ? <Title>A gold line style</Title>
? ? ? <FeatureTypeStyle>
? ? ? ? <Rule>
? ? ? ? ? <Title>Scale < 9M</Title>
? ? ? ? ? <MaxScaleDenominator>9000000</MaxScaleDenominator>
? ? ? ? ? <PolygonSymbolizer>
? ? ? ? ? ? <Fill>
? ? ? ? ? ? ? <CssParameter name="fill">#f00</CssParameter>
? ? ? ? ? ? ? <CssParameter name="fill-opacity">0.5</CssParameter>
? ? ? ? ? ? </Fill>
? ? ? ? ? ? <Stroke>
? ? ? ? ? ? ? <CssParameter name="stroke">#000</CssParameter>
? ? ? ? ? ? ? <CssParameter name="stroke-width">5</CssParameter>
? ? ? ? ? ? </Stroke>
? ? ? ? ? </PolygonSymbolizer>
? ? ? ? </Rule>
? ? ? ? <Rule>
? ? ? ? ? <Title>Scale between 9M and 30M</Title>
? ? ? ? ? <MinScaleDenominator>9000000</MinScaleDenominator>
? ? ? ? ? <MaxScaleDenominator>30000000</MaxScaleDenominator>
? ? ? ? ? <PolygonSymbolizer>
? ? ? ? ? ? <Fill>
? ? ? ? ? ? ? <CssParameter name="fill">#0f0</CssParameter>
? ? ? ? ? ? ? <CssParameter name="fill-opacity">0.5</CssParameter>
? ? ? ? ? ? </Fill>
? ? ? ? ? ? <Stroke>
? ? ? ? ? ? ? <CssParameter name="stroke">#000</CssParameter>
? ? ? ? ? ? ? <CssParameter name="stroke-width">2</CssParameter>
? ? ? ? ? ? </Stroke>
? ? ? ? ? </PolygonSymbolizer>
? ? ? ? </Rule>
? ? ? ? <Rule>
? ? ? ? ? <Title>Scale > 30M</Title>
? ? ? ? ? <MinScaleDenominator>30000000</MinScaleDenominator>
? ? ? ? ? <PolygonSymbolizer>
? ? ? ? ? ? <Fill>
? ? ? ? ? ? ? <CssParameter name="fill">#00f</CssParameter>
? ? ? ? ? ? </Fill>
? ? ? ? ? ? <Stroke>
? ? ? ? ? ? ? <CssParameter name="stroke">#000</CssParameter>
? ? ? ? ? ? </Stroke>
? ? ? ? ? </PolygonSymbolizer>
? ? ? ? </Rule>
? ? ? </FeatureTypeStyle>
? ? </UserStyle>
? </NamedLayer>
</StyledLayerDescriptor>
Checkout My Other Articles dedicated to styling of Geoserver
Who am I ? ????
Hi, I'm Krishna Lodha, I'm an open source GIS Developer, Contributor and Content creator. I have my agency?Rotten Grapes Pvt. Ltd.?where we develop Web GIS Applications using Open source stack.
Apart from development, I upload Videos about such technologies on?YouTube. I upload new blogposts every now and then on this LinkedIn Newsletter.?Make sure you Subscribe before you leave??.
Associate Technology Specialist at Tech Mahindra
2 年This can be achieved if we are working with wms layer, so that sld can be created using qgis and other sources as well. But most challenging is that to add style on front end if we use wfs from geoserver mostly for polygon.
Realtor Associate @ Next Trend Realty LLC | HAR REALTOR, IRS Tax Preparer
2 年I'll keep this in mind.
Manager - Technical Services specializing in Geospatial Technology, Digital Reality, Digital Twins and Emergency Response Systems
2 年Would request/advise you to use correct India boundaries that includes the PoK and shows Laddakh and JnK to avoid displeasure with public and government agencies. The rest is informative like it always is with your blogs.