How to follow oneway directions using sld?

Question

I want to show oneway directions of streets using SLD in geoserver. I follow this instruction but i still have a problem with directions of arrows. Most of all arrows get south to north and west to east direction. The arrows don't follow the direction of the lines. How to solve this issue?

<?xml version="1.0" encoding="ISO-8859-1"?>
<StyledLayerDescriptor version="1.0.0"
  xsi:schemaLocation="http://www.opengis.net/sld http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd"
  xmlns="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc"
  xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

  <NamedLayer>
    <Name>oneway_ir</Name>
    <UserStyle>
      <Title>A gold line style</Title>
      
      <FeatureTypeStyle>
       
       <Rule>
               <MaxScaleDenominator>2000000</MaxScaleDenominator>
      <TextSymbolizer>
        <Label>
          <ogc:Literal>&#x2192;</ogc:Literal>
        </Label>
        <Font>
          <CssParameter name="font-family">Lucida Sans</CssParameter>
          <CssParameter name="font-size">18</CssParameter>
        </Font>
        <Fill>
          <CssParameter name="fill">#000000</CssParameter>
        </Fill>
         <VendorOption name="followLine">true</VendorOption>
        
      </TextSymbolizer>
            
    </Rule>
    
          </FeatureTypeStyle>
        </UserStyle>
      </NamedLayer>
    </StyledLayerDescriptor>

Answer 1

Labels that might be looking "downwards" are automatically flipped to keep them readable. You can turn that off using the "forceLeftToRight" vendor option:

https://docs.geoserver.org/latest/en/user/styling/sld/reference/labeling.html#forcelefttoright