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I am trying to pass my fill parameter for GeoServer SLD and I am using SVG, found some reference from here GeoServer filter , but getting below error, also sharing the working code where I tried to make rule with and filter

This sample svg can be use here, with any sample data which have two attributes here in my case act_id and structure_type

This one will create dynamic fill value depending upon property value

        <Rule>
          <Name>Cement Nala Bunds</Name>
          <Filter>
            <PropertyIsEqualTo>
              <PropertyName>act_id</PropertyName>
              <Literal>305</Literal>
            </PropertyIsEqualTo>
          </Filter>
          <PointSymbolizer>
            <Graphic>
              <ExternalGraphic>
                <OnlineResource
                   xlink:type="simple" 
                   xlink:href="nrm_styles/KTW.svg?fill=${if_then_else(structure_type == 'existing', '#cfcccc', '#84fa8d')}" />
                <Format>image/svg+xml</Format>
              </ExternalGraphic>
              <Size>
                <Literal>20</Literal>
              </Size>
            </Graphic>
          </PointSymbolizer>
        </Rule>

This one is working which will be forced to make seperate rule for each condintion which will be repeatable

       <Rule>
          <Name>Cement Nala Bunds</Name>
          <Filter>
            <And>
              <PropertyIsEqualTo>
                <PropertyName>act_id</PropertyName>
                <Literal>305</Literal>
              </PropertyIsEqualTo>
              <PropertyIsEqualTo>
                <PropertyName>structure_type</PropertyName>
                <Literal>existing</Literal>
              </PropertyIsEqualTo>
            </And>
          </Filter>
          <PointSymbolizer>
            <Graphic>
              <ExternalGraphic>
                <OnlineResource xlink:type="simple" xlink:href="nrm_styles/KTW.svg?fill=#84fa8d" />
                <Format>image/svg+xml</Format>
              </ExternalGraphic>
              <Size>
                <Literal>20</Literal>
              </Size>
            </Graphic>
          </PointSymbolizer>
        </Rule>

Error

java.lang.illegalArgumentException: Invalid cql expression 'if_then_else(structure_type == 'existing', '#cfcccc', '#84fa8d')'
Invalid cql expression 'if_then_else(structure_type == 'existing', '#cfcccc', '#84fa8d')'
Encountered "==" at line 1, column 29.
was expecting one of:
    ")"...
    "."...
    ":"...
    "*"...
    "+"...  
    <IDENTIFIER>...
    "("...
    Parsing : 'if_then_else(structure_type == 'existing', '#cfcccc', '#84fa8d')'

Also trying same thing in CSS module using recode and dynamic url as suggested by previous question

/* @title Cement Nala */
[act_id = 305] {
  mark: url('KTW.svg?fill=#cfcccc');
  mark-mime: "image/svg+xml";
  mark-size: 20;
}

/* @title Cement Nala Bund */
[act_id = 322] {
  mark: url('${if_then_else(structure_type=existing, KTW.svg?fill=#cfcccc, KTW.svg?fill=#ff0000)}');
  mark-mime: "image/svg+xml";
  mark-size: 20;
}


/* @title Cement Nala Bund  */
[act_id = 322] {
  mark-size: 20; 
  :mark {
    url: [
    recode(structure_type,
      'existing','KTW.svg?fill=#ff0000',
      'proposed','KTW.svg?fill=#ff9933'
    )]
  };
  mark-mime: "image/svg+xml";
}
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5
  • 3
    please post the error from the log file as text not an unreadable image
    – Ian Turton
    Commented Oct 22 at 13:29
  • Please click one the image it will open in readable size
    – SpiderMan
    Commented Oct 22 at 13:32
  • 3
    Images are unreadable - please paste in the text!
    – Ian Turton
    Commented Oct 22 at 14:41
  • 1
    Images are not legible on all devices, and can't be searched by others with the same issue. Text logs should always be posted as text.
    – Vince
    Commented Oct 22 at 15:30
  • please check updated version of question.
    – SpiderMan
    Commented Oct 23 at 5:51

1 Answer 1

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1

I haven't got anything handy to test this on, but I think you just need one '=' instead of '=='.

if_then_else(structure_type = 'existing', '#cfcccc', '#84fa8d')

ECQL Reference: https://docs.geoserver.org/stable/en/user/filter/ecql_reference.html

Improve this answer
4
  • you can see the other example in the format of css style, where i tried this approach which is not working
    – SpiderMan
    Commented Oct 24 at 8:21
  • Did you try it in the SLD? You could also try equalTo(), e.g. if_then_else(equalTo(structure_type,'existing'), '#cfcccc', '#84fa8d'))
    – SirLostalot
    Commented Oct 24 at 16:35
  • as suggested by @SirLostalot tried this approach <OnlineResource xlink:type="simple" xlink:href="KTW.svg?fill=${if_then_else(equalTo(structure_type,'existing'), '#cfcccc', '#84fa8d'))}" /> but error says line 23: cvc-datatype-valid.1.2.1: 'KTW.svg?fill=${if_then_else(equalTo(structure_type,'existing'), '#cfcccc', '#84fa8d'))}' is not a valid value for 'anyURI'. line 23: cvc-attribute.3: The value 'KTW.svg?fill=${if_then_else(equalTo(structure_type,'existing'), '#cfcccc', '#84fa8d'))}' of attribute 'xlink:href' on element 'OnlineResource' is not valid with respect to its type, 'anyURI'
    – SpiderMan
    Commented Oct 25 at 12:41
  • That one might be to do with the '#''s in the colour hex. And my knowledge of this issue is fading fast..... You could try replacing those with something like '&#35;' depending on the encoding, but I'd put that outside of the if_then_else. Perhaps KTW.svg?fill=&#35;${if_then_else(equalTo(structure_type,'existing'),'cfcccc', '84fa8d'))}.
    – SirLostalot
    Commented Oct 25 at 16:27

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