All
I've been attempting with not much luck to get a database property to control
our map's line-style (i.e. dots, dashes etc) through SLD. If I use:
<sld:CssParameter
name="stroke-dasharray"><ogc:PropertyName>DASHARRAY</ogc:PropertyName></sld:CssParameter>
...the line always ends up as solid, as if it's completely ignoring the
property (or possibly the whole rule), even though the GeoServer logs do not
indicate a problem. If I specify the stroke-dasharray explicitly, like this:
<sld:CssParameter name="stroke-dasharray">5 2</sld:CssParameter>
...then the whole SLD works perfectly, but obviously with a fixed dash, which
is not what I want. The underlying table has a field called 'DASHARRAY' which
contains values such as '5 1', '5 2 3 2','none' etc etc. The first rule below
takes the records where DASHARRAY doesn't equal 'none' and ties to assign the
DASHARRAY value to the CSS - the second rule takes the DASHARRAY 'none'
records and processes them without the stroke-dasharray element
If anyone knows how to successfully achieve this, please let me know. I've
included below both the SLD and a sample of the data in the DASHARRAY database
field:
SLD
<?xml version="1.0" encoding="UTF-8"?>
<sld:StyledLayerDescriptor xmlns="http://www.opengis.net/sld";
xmlns:sld="http://www.opengis.net/sld"; xmlns:ogc="http://www.opengis.net/ogc";
xmlns:gml="http://www.opengis.net/gml"; version="1.0.0">
<sld:NamedLayer>
<sld:Name>SWW_StyledLines</sld:Name>
<sld:UserStyle>
<sld:Name>SWW_StyledLines</sld:Name>
<sld:Title>SWW styled lines</sld:Title>
<sld:IsDefault>1</sld:IsDefault>
<sld:Abstract>SWW styled lines</sld:Abstract>
<sld:FeatureTypeStyle>
<sld:Name>TSColouredAndStyledByData</sld:Name>
<sld:Rule>
<sld:Name>Rule 1</sld:Name>
<sld:Title>ColouredAndStyledByDataDashed</sld:Title>
<sld:Abstract>Colour and style in fields MS_WEIGHT, HEXCOLOR and
DASHARRAY</sld:Abstract>
<sld:MinScaleDenominator>1</sld:MinScaleDenominator>
<sld:MaxScaleDenominator>100000.0</sld:MaxScaleDenominator>
<ogc:Filter>
<ogc:PropertyIsNotEqualTo>
<ogc:PropertyName>DASHARRAY</ogc:PropertyName>
<Literal>none</Literal>
</ogc:PropertyIsNotEqualTo>
</ogc:Filter>
<sld:LineSymbolizer>
<sld:Stroke>
<sld:CssParameter
name="stroke"><ogc:PropertyName>HEXCOLOR</ogc:PropertyName></sld:CssParameter>
<sld:CssParameter
name="stroke-width"><ogc:PropertyName>MS_WEIGHT</ogc:PropertyName></sld:CssParameter>
<sld:CssParameter
name="stroke-dasharray"><ogc:PropertyName>DASHARRAY</ogc:PropertyName></sld:CssParameter>
</sld:Stroke>
</sld:LineSymbolizer>
</sld:Rule>
<sld:Rule>
<sld:Name>Rule 2</sld:Name>
<sld:Title>ColouredAndStyledByDataSolid</sld:Title>
<sld:Abstract>Colour and style in fields MS_WEIGHT, HEXCOLOR</sld:Abstract>
<sld:MinScaleDenominator>1</sld:MinScaleDenominator>
<sld:MaxScaleDenominator>100000.0</sld:MaxScaleDenominator>
<ogc:Filter>
<ogc:PropertyIsEqualTo>
<ogc:PropertyName>DASHARRAY</ogc:PropertyName>
<Literal>none</Literal>
</ogc:PropertyIsEqualTo>
</ogc:Filter>
<sld:LineSymbolizer>
<sld:Stroke>
<sld:CssParameter
name="stroke"><ogc:PropertyName>HEXCOLOR</ogc:PropertyName></sld:CssParameter>
<sld:CssParameter
name="stroke-width"><ogc:PropertyName>MS_WEIGHT</ogc:PropertyName></sld:CssParameter>
</sld:Stroke>
</sld:LineSymbolizer>
</sld:Rule>
</sld:FeatureTypeStyle>
</sld:UserStyle>
</sld:NamedLayer>
</sld:StyledLayerDescriptor>
Sample data from DASHARRAY field (Oracle varchar2(20))
none
4 1
4 1
5 2 1 2
5 2 1 2
5 2 1 2
4 1
4 1
5 2 1 2
4 1
4 1
5 2 1 2
5 2 1 2
none
4 1
none
none
5 2 1 2
Thanks
Spencer Jones
GIS Tech Admin
South West Water
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