private void Disposed(IGeoDataDriver ldfDrv, IRasterDataProvider ldfPrd, IRasterBand ldfBand, IMvgDriver mvgDrv, IMvgDataProvider mvgPrd, IRasterBand mvgBand)
{
if (mvgBand != null)
{
mvgBand.Dispose();
}
if (mvgPrd != null)
{
mvgPrd.Dispose();
}
if (mvgDrv != null)
{
mvgDrv.Dispose();
}
if (ldfBand != null)
{
ldfBand.Dispose();
}
if (ldfPrd != null)
{
ldfPrd.Dispose();
}
if (ldfDrv != null)
{
ldfDrv.Dispose();
}
}
public void Compute(IRasterDataProvider dataProvider, string expression, string outDriver, string outFile, Action <int, string> progressTracker)
{
if (dataProvider == null || string.IsNullOrWhiteSpace(expression) || string.IsNullOrWhiteSpace(outDriver) || string.IsNullOrWhiteSpace(outFile))
{
throw new ArgumentNullException();
}
IGeoDataDriver driver = GeoDataDriver.GetDriverByName(outDriver);
if (driver == null)
{
throw new Exception("driver '" + outDriver + "' is not existed.");
}
IRasterDataProvider dstProvider = CreateDstDataProvider(driver as IRasterDataDriver, outFile, dataProvider);
if (dataProvider == null)
{
throw new Exception("use '" + outDriver + "'create RasterDataProvider is failed.");
}
try
{
Compute(dataProvider, expression, dstProvider.GetRasterBand(1), progressTracker);
}
finally
{
dstProvider.Dispose();
driver.Dispose();
}
}
public unsafe void ReadMvgFile_noOffset_Bigger()
{
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[] data = new Int16[prd.Width * 2 * 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 = data)
{
IntPtr buffer = new IntPtr(ptr);
band.Read(0, 0, prd.Width, prd.Height, buffer, enumDataType.Int16, prd.Width * 2, prd.Height);
}
string dstFname = @"e:\mvg";//@"C:\工作\3.13\read";
WriteBandToFile(data, dstFname + "_bigger" + "_read" + ".dat");
prd.Dispose();
drv.Dispose();
}
public unsafe void ReadMvgFileNormal()
{
// _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[] data = 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 = data)
{
IntPtr buffer = new IntPtr(ptr);
band.Read(0, 0, prd.Width, prd.Height, buffer, enumDataType.Int16, prd.Width, prd.Height);
}
string dstFname = @"e:\mvg";//@"C:\工作\3.13\read";
WriteBandToFile(data, dstFname + "_normal" + "_read" + ".dat");
prd.Dispose();
drv.Dispose();
}
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();
}
public void MvgToLdfFile()
{
_fname = @"E:\气象局项目\MAS二期\mvg文件\FOG_DBLV_FY3A_VIRR_1000M_DXX_P001_200911131354.mvg";
IGeoDataDriver drv = GeoDataDriver.GetDriverByName("MVG");
IRasterDataProvider prd = drv.Open(_fname, enumDataProviderAccess.ReadOnly) as IRasterDataProvider;
Assert.NotNull(prd);
IMvgDataProvider mvgPrd = prd as IMvgDataProvider;
MvgHeader mvgHeader = mvgPrd.Header;
Assert.NotNull(mvgHeader);
Console.WriteLine("mvgHeader.HeaderSize = " + mvgHeader.HeaderSize);
Console.WriteLine("mvgHeader.Width = " + mvgHeader.Width);
Console.WriteLine("mvgHeader.Height = " + mvgHeader.Height);
mvgPrd.ToLdfFile();
mvgPrd.Dispose();
prd.Dispose();
drv.Dispose();
}