mapnik/tests/visual_tests/styles/line-pattern-smooth-and-offset.xml

<?xml version="1.0" encoding="UTF-8"?>
<Map background-color="white">

    <Style name="style">
        <Rule>
            <LineSymbolizer stroke="yellow" stroke-width="6" offset="30" smooth="1" simplify="50000" simplify-algorithm="visvalingam-whyatt"/>
            <LineSymbolizer stroke="orange" stroke-width="6" offset="20" smooth="1"/>
            <LineSymbolizer stroke="red" stroke-width="6" offset="10" smooth="1"/>
            <LineSymbolizer stroke="green" stroke-width="6" offset="0" smooth="1"/>
            <LineSymbolizer stroke="blue" stroke-width="6" offset="-10" smooth="1"/>
            <LineSymbolizer stroke="purple" stroke-width="6" offset="-20" smooth="1"/>
            <LinePatternSymbolizer file="../../data/svg/octocat.svg" opacity=".1" comp-op="multiply" transform="scale(.05)" offset="30" smooth="1"/>
            <LinePatternSymbolizer file="../../data/svg/octocat.svg" opacity=".1" comp-op="multiply" transform="scale(.05) rotate(90)" offset="-20" smooth="1"/>
            <TextSymbolizer placement="line" size="14" simplify="50000" simplify-algorithm="visvalingam-whyatt" halo-radius="1" character-spacing="3" spacing="25" face-name="DejaVu Sans Book" dy="10" smooth="1">'offset • +10'</TextSymbolizer>
            <TextSymbolizer placement="line" size="14" halo-radius="1" character-spacing="3" spacing="25" face-name="DejaVu Sans Book" dy="-18" smooth="1">'offset • -18'</TextSymbolizer>
        </Rule>
    </Style>

    <Layer name="layer">
        <StyleName>style</StyleName>
        <Datasource>
            <Parameter name="type">shape</Parameter>
            <Parameter name="file">../data/line.shp</Parameter>
        </Datasource>
    </Layer>
</Map>