Can I use strLength not just for labeling, but for the Filter?
Here's what I'm trying to do... if the road's route number is 3 digits, use a
wider road shield.
However, this doesn't work - I get the wider road shield regardless of digits.
So I'm wondering if I'm not allowed to use strLength under Filter?
<Rule>
<Filter xmlns="http://www.opengis.net/ogc";>
<Function name="strLength">
<PropertyName>RT_NUMBER</PropertyName>
<Literal>3</Literal>
</Function>
</Filter>
<TextSymbolizer>
<Label>
<PropertyName
xmlns="http://www.opengis.net/ogc";>RT_NUMBER</PropertyName>
</Label>
<Fill>
<CssParameter name="fill">#686868</CssParameter>
</Fill>
<Font>
<CssParameter
name="font-family">Verdana</CssParameter>
<CssParameter name="font-size">9</CssParameter>
<CssParameter name="font-weight">bold</CssParameter>
</Font>
<Graphic>
<ExternalGraphic>
<OnlineResource
xlink:href="http://maps.massgis.state.ma.us/images/state_rectangle.gif"/>
<Format>image/png</Format>
</ExternalGraphic>
<Size>28</Size>
</Graphic>
<VendorOption name="spaceAround">5</VendorOption>
<VendorOption name="group">true</VendorOption>
<Priority>100000</Priority>
</TextSymbolizer>
</Rule>
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