Use ${myattributename}, see e.g. vector-features-with-text.html in the examples
dir.
Best regards,
Bart
On Jun 4, 2010, at 4:00 PM, Martin.L wrote:
>
> Keywords: GeoServer 2.0.2, OpenLayers, SLD
>
> Hey there!
>
> Is it possible to define the size of a PointSymbolizer with a variable? So
> far the SLD-Code looks like this:
>
>
> [...]
> <Rule>
> <Title>Magnitude < 3</Title>
> <ogc:Filter>
> <ogc:PropertyIsLessThan>
> <ogc:PropertyName>magnitude</ogc:PropertyName>
> <ogc:Literal>3</ogc:Literal>
> </ogc:PropertyIsLessThan>
> </ogc:Filter>
> <PointSymbolizer>
> <Graphic>
> <Mark>
> <WellKnownName>circle</WellKnownName>
> <Fill>
> <CssParameter name="fill-opacity">0.4</CssParameter>
> <CssParameter name="fill">#FF0000</CssParameter>
> </Fill>
> </Mark>
> <Size>4</Size>
> </Graphic>
> </PointSymbolizer>
> </Rule>
> [...]
>
>
> Now I want to replace the constant size 4 with a variable which contains a
> double value (magnitude). How can I realize it?
>
> I found an idea with GeoServer 2.0.2. Perhaps you find a further solution
> for it. With GeoServer 2.0.2 you can use Parameter substitution in SLD (
> http://docs.geoserver.org/stable/en/user/styling/sld-extensions/substitution.html
> Parameter Substitution ). So I made a new SLD looks like this:
>
>
> [...]
> <PointSymbolizer>
> <Graphic>
> <Mark>
> <WellKnownName>circle</WellKnownName>
> <Fill>
> <CssParameter name="fill">
> #<ogc:Function name="env">
> <ogc:Literal>color</ogc:Literal>
> <ogc:Literal>FF0000</ogc:Literal>
> </ogc:Function>
> </CssParameter>
> </Fill>
> </Mark>
> <Size>
> <ogc:Function name="env">
> <ogc:Literal>size</ogc:Literal>
> <ogc:Literal>6</ogc:Literal>
> </ogc:Function>
> </Size>
> </Graphic>
> </PointSymbolizer>
> [...]
>
>
> With this SLD you can manipulate the WMS-request with a env-Parameter in a
> adressbar or in OpenLayers WMS-request looking like this:
>
>
> earthquakes = new OpenLayers.Layer.WMS(
> "Earthquakes",
> "/geoserver/wms?",
> {
> layers: "cite:EarthquakeView",
> env: "size:16", //<<------
> transparent: "true"
> },
> {
> buffer: 0,
> visibility: true,
> isBaseLayer: false,
> displayInLayerSwitcher: true
> }
> );
>
>
> Is it possible to get a value from WMS-request from GeoServer or from my db
> where the data is stored? If it is, I could add this value to the
> env-parameter.
>
> A great thank you in advance.
> Martin
> --
> View this message in context:
> http://osgeo-org.1803224.n2.nabble.com/SLD-PointSymbolizer-size-defined-with-variable-tp5139542p5139542.html
> Sent from the OpenLayers Users mailing list archive at Nabble.com.
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> Users mailing list
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