<VRTDataset rasterXSize="20" rasterYSize="20">
    <VRTRasterBand dataType="Byte" band="1">
        <ColorInterp>Gray</ColorInterp>
        <SimpleSource>
        <SourceFilename relativeToVRT="1">byte.tif</SourceFilename>
        <SourceBand>1</SourceBand>
        <SrcRect xOff="0" yOff="0" xSize="20" ySize="20"/>
        <DstRect xOff="0" yOff="0" xSize="20" ySize="20"/>
        </SimpleSource>
    </VRTRasterBand>
    <GCPList>
        <GCP Id="1" Pixel="0" Line="0" X="0" Y="0"/>
        <GCP Id="2" Pixel="0" Line="50" X="0" Y="50"/>
        <GCP Id="3" Pixel="50" Line="50" X="50" Y="50"/>
        <GCP Id="4" Pixel="50" Line="0" X="50" Y="0"/>
    </GCPList>
</VRTDataset>
