aws_terrain.xml

<GDAL_WMS>
    <Service name="TMS">
        <ServerUrl>http://elevation-tiles-prod.s3.amazonaws.com/geotiff/${z}/${x}/${y}.tif</ServerUrl>
    </Service>
    <DataWindow>
        <UpperLeftX>-20037508.34</UpperLeftX>
        <UpperLeftY>20037508.34</UpperLeftY>
        <LowerRightX>20037508.34</LowerRightX>
        <LowerRightY>-20037508.34</LowerRightY>
        <TileLevel>14</TileLevel>
        <TileCountX>1</TileCountX>
        <TileCountY>1</TileCountY>
        <YOrigin>top</YOrigin>
    </DataWindow>
    <ImageFormat>image/tif</ImageFormat>
    <DataType>UInt32</DataType>
    <Projection>EPSG:3857</Projection>
    <BlockSizeX>512</BlockSizeX>
    <BlockSizeY>512</BlockSizeY>
    <BandsCount>1</BandsCount>
    <MaxConnections>100</MaxConnections>
    <ZeroBlockOnServerException>true</ZeroBlockOnServerException>
</GDAL_WMS>