本地瓦片地图数据的加载——TMS服务 - TheWrangler/sqGis GitHub Wiki

<GDAL_WMS>
    <Service name="TMS">
        <Version>1.1.3</Version>
        <ServerUrl>file:///E:/QGis/chinamap/exp/tiles/${z}/${x}/${y}.png</ServerUrl>
        <ImageFormat>image/png</ImageFormat>
    </Service>
    <DataWindow>
        <UpperLeftX>-20037508</UpperLeftX>
        <UpperLeftY>20037508</UpperLeftY>
        <LowerRightX>20037508</LowerRightX>
        <LowerRightY>-20037508</LowerRightY>
        <TileLevel>7</TileLevel>
        <YOrigin>default</YOrigin>
    </DataWindow>
    <Projection>WGS84</Projection>
    <BlockSizeX>256</BlockSizeX>
    <BlockSizeY>256</BlockSizeY>
    <BandsCount>3</BandsCount>
    <DataType>byte</DataType>
    <ZeroBlockHttpCodes>204,303,400,404,500,501</ZeroBlockHttpCodes>
    <ZeroBlockOnServerException>true</ZeroBlockOnServerException>
</GDAL_WMS>

<ServerUrl>http://tile.openstreetmap.org/${z}/${x}/${y}.png</ServerUrl>

QgsRasterLayer* layer = new QgsRasterLayer(filename, filename);
if (!layer->isValid())
{
    QMessageBox::critical(this, QStringLiteral("错误"), QStringLiteral("初始化图层失败!\n") + filename);
    return;
}