vrt sample

<VRTDataset rasterXSize="21396" rasterYSize="20324" subClass="VRTWarpedDataset">
  <SRS>PROJCS["Korea 2000 / Unified CS",GEOGCS["Korea 2000",DATUM["Geocentric_datum_of_Korea",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6737"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4737"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",38],PARAMETER["central_meridian",127.5],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",1000000],PARAMETER["false_northing",2000000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","5179"]]</SRS>
  <GeoTransform>  7.4610000000000000e+05,  3.0000000000000000e+01,  0.0000000000000000e+00,  2.0684700000000000e+06,  0.0000000000000000e+00, -3.0000000000000000e+01</GeoTransform>
  <Metadata>
    <MDI key="AREA_OR_POINT">Area</MDI>
  </Metadata>
  <VRTRasterBand dataType="Float32" band="1" subClass="VRTWarpedRasterBand">
    <NoDataValue>0</NoDataValue>
    <ColorInterp>Gray</ColorInterp>
  </VRTRasterBand>
  <BlockXSize>256</BlockXSize>
  <BlockYSize>256</BlockYSize>
  <GDALWarpOptions>
    <WarpMemoryLimit>6.71089e+07</WarpMemoryLimit>
    <ResampleAlg>NearestNeighbour</ResampleAlg>
    <WorkingDataType>Float32</WorkingDataType>
    <Option name="INIT_DEST">NO_DATA</Option>
    <SourceDataset relativeToVRT="1">dem.30m.1.tiff</SourceDataset>
    <Transformer>
      <ApproxTransformer>
        <MaxError>0.125</MaxError>
        <BaseTransformer>
          <GenImgProjTransformer>
            <SrcGeoTransform>746100,30,0,2068470,0,-30</SrcGeoTransform>
            <SrcInvGeoTransform>-24870,0.0333333333333333329,0,68949,0,-0.0333333333333333329</SrcInvGeoTransform>
            <DstGeoTransform>746100,30,0,2068470,0,-30</DstGeoTransform>
            <DstInvGeoTransform>-24870,0.0333333333333333329,0,68949,0,-0.0333333333333333329</DstInvGeoTransform>
          </GenImgProjTransformer>
        </BaseTransformer>
      </ApproxTransformer>
    </Transformer>
    <BandList>
      <BandMapping src="1" dst="1">
        <SrcNoDataReal>0</SrcNoDataReal>
        <SrcNoDataImag>0</SrcNoDataImag>
        <DstNoDataReal>0</DstNoDataReal>
        <DstNoDataImag>0</DstNoDataImag>
      </BandMapping>
    </BandList>
  </GDALWarpOptions>
</VRTDataset>