public unsafe void WriteMvgFileNormal()
{
// _fname = @"C:\工作\3.13\SNW_DBLV_FY3A_VIRR_1000M_NULL_P001_200911131356.mvg";
IGeoDataDriver drv = GeoDataDriver.GetDriverByName("MVG");
IRasterDataProvider prd = drv.Open(_fname, enumDataProviderAccess.ReadOnly) as IRasterDataProvider;
Assert.NotNull(prd);
IRasterBand band = prd.GetRasterBand(1);
Assert.NotNull(band);
Int16[] buffer = new Int16[prd.Width * prd.Height];
Console.WriteLine("prd.Width = " + prd.Width);
Console.WriteLine("prd.Height = " + prd.Height);
Console.WriteLine("band.Width = " + band.Width);
Console.WriteLine("band.Height= " + band.Height);
fixed(Int16 *ptr = buffer)
{
IntPtr bufferPtr = new IntPtr(ptr);
band.Read(0, 0, prd.Width, prd.Height, bufferPtr, enumDataType.Int16, prd.Width, prd.Height);
}
string dstFname = @"e:\mvg_writer.bin";
string mapInfo = "{1,1}:{110,35}:{0.01,0.01}";
Int16 valueCount = 2;
bool withHdr = true;
string values = "{ 0, 1 }";
string valueNames = "{120,99}";
IMvgDataProvider prdWriter = (drv as IRasterDataDriver).Create(dstFname, prd.Width, prd.Height, 1, enumDataType.Int16, "VALUECOUNT=" + valueCount, "VALUES=" + values,
"VALUENAMES=" + valueNames, "MAPINFO=" + mapInfo, "WITHHDR=" + withHdr.ToString()) as IMvgDataProvider;
IRasterBand bandWriter = prdWriter.GetRasterBand(1);
fixed(Int16 *ptr = buffer)
{
IntPtr bufferPtr = new IntPtr(ptr);
bandWriter.Write(0, 0, prd.Width, prd.Height, bufferPtr, enumDataType.Int16, prd.Width, prd.Height);
}
prd.Dispose();
drv.Dispose();
prdWriter.Dispose();
}
/// <summary>
/// ldf文件另存为mvg文件
/// </summary>
/// <param name="ldfName">ldf文件名</param>
/// <param name="mvgName">mvg文件名</param>
/// <param name="bandNo">需要获取的波段号</param>
/// <param name="options">
/*
* VALUECOUNT = 2 //default:0
* VALUES = "{0,1}" //
* VALUENAMES //
* SPATIALREF=Proj4 //default:wgs-84
* MAPINFO={X,Y}:{Col,Row}:{ResolutionX,ResolutionY} //default:null
* WITHHDR=[TRUE|FALSE] //default:true
*/
/// </param>
public static void FromLDF(string ldfFileName, string mvgFileName, int bandNo, params object[] options)
{
IGeoDataDriver ldfDrv = null;
IRasterDataProvider ldfPrd = null;
IRasterBand ldfBand = null;
IMvgDriver mvgDrv = null;
IMvgDataProvider mvgPrd = null;
IRasterBand mvgBand = null;
try
{
ldfDrv = GeoDataDriver.GetDriverByName("LDF");
if (ldfDrv == null)
{
return;
}
ldfPrd = ldfDrv.Open(ldfFileName, enumDataProviderAccess.ReadOnly) as IRasterDataProvider;
if (ldfPrd == null)
{
return;
}
Ldf1Header ldfHeader = (ldfPrd as ILdfDataProvider).Header as Ldf1Header;
if (ldfHeader == null || (ldfHeader.DataType != enumDataType.Int16 && ldfHeader.DataType != enumDataType.UInt16))
{
throw new NotSupportedException("只支持Int16和UInt16数据格式的LDF文件转换！");
}
ldfBand = ldfPrd.GetRasterBand(bandNo);
if (ldfBand == null)
{
return;
}
//创建MVG文件
mvgDrv = GeoDataDriver.GetDriverByName("MVG") as IMvgDriver;
if (mvgDrv == null)
{
return;
}
mvgPrd = mvgDrv.Create(mvgFileName, ldfBand.Width, ldfBand.Height, 1, enumDataType.Int16, options) as IMvgDataProvider;
if (mvgPrd == null)
{
return;
}
MvgHeaderConvertor.FillMvgHeader(ldfHeader, mvgPrd.Header);
//重新生成hdr头文件
string hdrFileName = HdrFile.GetHdrFileName(mvgFileName);
HdrFile.SaveTo(hdrFileName, mvgPrd.Header.ToHdrFile());
//读数据并写入MVG文件中
mvgBand = mvgPrd.GetRasterBand(1);
if (mvgBand == null)
{
return;
}
WriteDataFromLdfToMvg(ldfHeader, ldfBand, mvgBand);
}
finally
{
if (mvgPrd != null)
{
(mvgPrd as MvgDataProvider).Disposed(ldfDrv, ldfPrd, ldfBand, mvgDrv, mvgPrd, mvgBand);
}
}
}