Best to use the vendor extension to do data sorting in that case:
http://docs.geoserver.org/stable/en/user/styling/sld/extensions/z-order/syntax.html

Cheers
Andrea

On Fri, Aug 31, 2018 at 11:57 PM Fagin, Todd D. <tfa...@ou.edu> wrote:

> Greetings,
>
>
>
> I know this is an issue that has been addressed before, but we are having
> some issues and am hoping for guidance.
>
>
>
> We have a point layer that has, in at least one instance, two points at
> the exact some location. Optimally, if would be best if both symbols
> rendered in a “stacked” fashion. However, only one of the features is
> showing. The next best option would be to prioritize the point drawn based
> on attribute value. We have used the <FeatureTypeStyle> tag, but the
> rendering is still not placing priority as we have indicated. I have a
> snippet of the SLD below.
>
>
>
> Any suggestions would be greatly appreciated.
>
>
>
> <FeatureTypeStyle>
>
>         <Rule>
>
>           <Name>Type 1</Name>
>
>           <Title>Type 1</Title>
>
>           <MaxScaleDenominator>750000</MaxScaleDenominator>
>
>           <ogc:Filter>
>
>             <ogc:PropertyIsEqualTo>
>
>               <ogc:PropertyName>gs</ogc:PropertyName>
>
>               <ogc:Literal>LA</ogc:Literal>
>
>             </ogc:PropertyIsEqualTo>
>
>           </ogc:Filter>
>
>           <PointSymbolizer>
>
>             <Graphic>
>
>               <ExternalGraphic>
>
>                 <OnlineResource xlink:type="simple" xlink:href="UT/LA.svg"
> />
>
>                 <Format>image/svg+xml</Format>
>
>               </ExternalGraphic>
>
>               <Size>
>
>                 <ogc:Literal>10</ogc:Literal>
>
>               </Size>
>
>             </Graphic>
>
>           </PointSymbolizer>
>
>         </Rule>
>
>       </FeatureTypeStyle>
>
>       <FeatureTypeStyle>
>
>         <Rule>
>
>           <Name>Type 2</Name>
>
>           <Title>Type 2</Title>
>
>           <MaxScaleDenominator>750000</MaxScaleDenominator>
>
>           <ogc:Filter>
>
>             <ogc:PropertyIsEqualTo>
>
>               <ogc:PropertyName>gs</ogc:PropertyName>
>
>               <ogc:Literal>PA</ogc:Literal>
>
>             </ogc:PropertyIsEqualTo>
>
>           </ogc:Filter>
>
>           <PointSymbolizer>
>
>             <Graphic>
>
>               <ExternalGraphic>
>
>                 <OnlineResource xlink:type="simple" xlink:href="UT/PA.svg"
> />
>
>                 <Format>image/svg+xml</Format>
>
>               </ExternalGraphic>
>
>               <Size>
>
>                 <ogc:Literal>16</ogc:Literal>
>
>               </Size>
>
>             </Graphic>
>
>           </PointSymbolizer>
>
>         </Rule>
>
>       </FeatureTypeStyle>
>
>
>
>
>
>
>
> Thank you,
>
>
>
> Todd
>
>
>
> Todd Fagin
>
>
>
> Oklahoma Natural Heritage Inventory/
>
> Oklahoma Biological Survey
>
>
>
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>
> If you want to request a feature or an improvement, also see this:
> https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer
>
>
> Geoserver-users@lists.sourceforge.net
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Please make sure you read the following two resources before posting to this 
list:
- Earning your support instead of buying it, but Ian Turton: 
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http://geoserver.org/comm/userlist-guidelines.html

If you want to request a feature or an improvement, also see this: 
https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer


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