gebco_template.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE Map[]>
<Map background-color="#2a383e" srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">

  <Style comp-op="color-dodge" filter-mode="first" name="gebco2019webmercator2">
    <Rule>
      <RasterSymbolizer default-color="rgba(0, 0, 0, 0)" default-mode="linear" scaling="bilinear">
        <stop color="#222222" value="0" />
        <stop color="#ebebeb" value="255" />
      </RasterSymbolizer>
    </Rule>
  </Style>
  <Layer name="gebco2019webmercator2" srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">
    <StyleName><![CDATA[gebco2019webmercator2]]></StyleName>
    <Datasource>
      <Parameter name="file"><![CDATA[/GEBCO_tiled/hs/FILENAME_HS.tif]]></Parameter>
      <Parameter name="band"><![CDATA[1]]></Parameter>
      <Parameter name="type"><![CDATA[gdal]]></Parameter>
    </Datasource>
  </Layer>
  <Style comp-op="color-dodge" filter-mode="first" name="gebco2019webmercator-deuce">
    <Rule>
      <RasterSymbolizer default-color="rgba(0, 0, 0, 0)" default-mode="linear" opacity="0.75" scaling="bilinear">
        <stop color="rgba(0, 0, 0, 0)" value="-350" />
        <stop color="#88b3ac" value="0" />
        <stop color="#e7f0ef" value="200" />
      </RasterSymbolizer>
    </Rule>
  </Style>
  <Style comp-op="multiply" filter-mode="first" name="gebco2019webmercator">
    <Rule>
      <RasterSymbolizer default-color="rgba(0, 0, 0, 0)" default-mode="linear" scaling="bilinear">
        <stop color="#000000" value="-10881" />
        <stop color="#ffffff" value="100" />
        <stop color="rgba(0, 0, 0, 0)" value="101" />
      </RasterSymbolizer>
    </Rule>
  </Style>
  <Layer name="gebco2019webmercator" srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">
    <StyleName><![CDATA[gebco2019webmercator]]></StyleName>
    <StyleName><![CDATA[gebco2019webmercator-deuce]]></StyleName>
    <Datasource>
      <Parameter name="file"><![CDATA[/GEBCO_tiled/FILENAME.tif]]></Parameter>
      <Parameter name="band"><![CDATA[1]]></Parameter>
      <Parameter name="type"><![CDATA[gdal]]></Parameter>
    </Datasource>
  </Layer>
</Map>