[GIS] Geoserver SLD line ends labeling

geoserversld

I am having a hard time putting labels on both ends of a line
Here is SLD that I have so far. It puts a label on one side only but I need it on both ends of a line.

<?xml version="1.0" encoding="ISO-8859-1"?>
<StyledLayerDescriptor version="1.0.0"
xsi:schemaLocation="http://www.opengis.net/sld 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>line_name_ends_red</Name>
<UserStyle>
<Title>line_name_ends_red</Title>
<FeatureTypeStyle>
<Rule>
<Name>line_name_ends_red</Name>
<LineSymbolizer>
<Stroke>
<CssParameter name="stroke">#ff0000</CssParameter>
<CssParameter name="stroke-width">2</CssParameter>
</Stroke>
</LineSymbolizer>
<TextSymbolizer>
<Geometry>
<ogc:Function name="endPoint">
<ogc:PropertyName>the_geom</ogc:PropertyName>
</ogc:Function>
</Geometry>
<LabelPlacement>
<PointPlacement>
<Rotation>
<ogc:Function name="endAngle">
<ogc:PropertyName>the_geom</ogc:PropertyName>
</ogc:Function>
</Rotation>
</PointPlacement>
</LabelPlacement>
<Label>
<ogc:PropertyName>LINE_NAME</ogc:PropertyName>
</Label>
</TextSymbolizer>
</Rule>
</FeatureTypeStyle>
</UserStyle>
</NamedLayer>
</StyledLayerDescriptor>

this is what my SLD produces
But I need it to look like this
But I need it to look like this

Best Answer

To get two labels you will need two textSymbolizers one for the start point and one for the end point. So it becomes:

<TextSymbolizer>
    <Geometry>
        <ogc:Function name="endPoint">
            <ogc:PropertyName>the_geom</ogc:PropertyName>
        </ogc:Function>
    </Geometry>
    <LabelPlacement>
        <PointPlacement>
            <Rotation>
                <ogc:Function name="endAngle">
                    <ogc:PropertyName>the_geom</ogc:PropertyName>
                </ogc:Function>
            </Rotation>
        </PointPlacement>
    </LabelPlacement>

    <Label>

        <ogc:PropertyName>LINE_NAME</ogc:PropertyName>

    </Label>
</TextSymbolizer>
<TextSymbolizer>
  <Geometry>
    <ogc:Function name="startPoint">
      <ogc:PropertyName>the_geom</ogc:PropertyName>
    </ogc:Function>
  </Geometry>
  <LabelPlacement>
    <PointPlacement>
      <Rotation>
        <ogc:Function name="startAngle">
          <ogc:PropertyName>the_geom</ogc:PropertyName>
        </ogc:Function>
      </Rotation>
    </PointPlacement>
  </LabelPlacement>

  <Label>

    <ogc:PropertyName>LINE_NAME</ogc:PropertyName>

  </Label>
</TextSymbolizer>
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