/// <summary>
///
/// </summary>
/// <param name="rasterFile">土地利用类型文件</param>
/// <param name="dblvFile">二值图文件</param>
/// <returns></returns>
private unsafe string GenerateNetImageFile(string rasterFile, string dblvFile)
{
using (IRasterDataProvider rasterprd = GeoDataDriver.Open(rasterFile) as IRasterDataProvider)
{
using (IRasterDataProvider dblvprd = GeoDataDriver.Open(dblvFile) as IRasterDataProvider)
{
//step1:将文件转换为类型一致
IRasterDataProviderConverter converter = new RasterDataProviderConverter();
string dstFileName = MifEnvironment.GetFullFileName("1.dat");
using (IRasterDataProvider dstDataProvider = converter.ConvertDataType <UInt16, Byte>(dblvprd, enumDataType.Byte, dstFileName,
(v) => { return((Byte)v); }))
{
//step2:裁切文件以保证大小一致
using (IRasterDataProvider sameSizeDataProvider = GetSameSizeDataProvider(rasterprd, dstDataProvider))
{
byte[] dataBlock = new byte[sameSizeDataProvider.Width * sameSizeDataProvider.Height];
fixed(byte *buffer = dataBlock)
{
IntPtr ptr = new IntPtr(buffer);
sameSizeDataProvider.GetRasterBand(1).Read(0, 0, sameSizeDataProvider.Width, sameSizeDataProvider.Height, ptr, enumDataType.Byte, sameSizeDataProvider.Width, sameSizeDataProvider.Height);
sameSizeDataProvider.Read(0, 0, sameSizeDataProvider.Width, sameSizeDataProvider.Height, ptr, enumDataType.Byte, sameSizeDataProvider.Width, sameSizeDataProvider.Height, 1, new int[] { 1 }, enumInterleave.BSQ);
}
if (sameSizeDataProvider == null)
{
return(null);
}
//step3:生成虚拟文件
VirtualRasterDataProvider vrd = new VirtualRasterDataProvider(new IRasterDataProvider[] { sameSizeDataProvider, dstDataProvider });
//step4:遍历虚拟文件生成结果
ArgumentProvider ap = new ArgumentProvider(vrd, null);
RasterPixelsVisitor <Byte> visitor = new RasterPixelsVisitor <Byte>(ap);
//生成结果
MemPixelFeatureMapper <Byte> memresult = new MemPixelFeatureMapper <Byte>("NIMG", 1000, new Size(vrd.Width, vrd.Height), vrd.CoordEnvelope, vrd.SpatialRef);
visitor.VisitPixel(new int[] { 1, 2 },
(index, values) =>
{
if (values[0] == 0)
{
memresult.Put(index, 0);
}
else if (values[1] == 0)
{
memresult.Put(index, 100);
}
else if (values[1] == 1)
{
memresult.Put(index, (byte)(100 + values[0]));
}
});
//保存文件
RasterIdentify idNIMG = new RasterIdentify(dblvFile);
idNIMG.ThemeIdentify = "CMA";
idNIMG.ProductIdentify = "SNW";
idNIMG.SubProductIdentify = "NIMG";
idNIMG.GenerateDateTime = DateTime.Now;
idNIMG.Satellite = dblvprd.DataIdentify.Satellite;
idNIMG.Sensor = dblvprd.DataIdentify.Sensor;
string fileName = MifEnvironment.GetFullFileName(idNIMG.ToLongString() + ".dat");
if (File.Exists(fileName))
{
idNIMG.GenerateDateTime = DateTime.Now.AddSeconds(1);
}
IInterestedRaster <Byte> iirNIMG = new InterestedRaster <Byte>(idNIMG, new Size(sameSizeDataProvider.Width, sameSizeDataProvider.Height), sameSizeDataProvider.CoordEnvelope.Clone(), sameSizeDataProvider.SpatialRef);
iirNIMG.Put(memresult);
iirNIMG.Dispose();
if (File.Exists(dstFileName))
{
File.Delete(dstFileName);
}
return(iirNIMG.FileName);
}
}
}
}
}
public IVirtualRasterDataProvider CreateVirtualRasterPRD(ref Dictionary <string, FilePrdMap> filePrdMap)
{
bool sucess = GetSameSizeFilePrdMap(ref filePrdMap, false);
if (!sucess)
{
return(null);
}
IRasterDataProvider dstDataProvider = null;
List <IRasterDataProvider> prdList = new List <IRasterDataProvider>();
IRasterDataProviderConverter converter = new RasterDataProviderConverter();
FilePrdMap fpm = null;
string dstPath = GetTemplateFilePath();
string dstFilename;
foreach (string key in filePrdMap.Keys)
{
fpm = filePrdMap[key];
dstFilename = dstPath + Guid.NewGuid() + ".ldf";
switch (fpm.Prd.DataType)
{
case enumDataType.Byte:
dstDataProvider = converter.ConvertDataType <Byte, float>(fpm.Prd.fileName, enumDataType.Float, dstFilename, (v) => { return((float)(v / fpm.Zoom)); });
break;
case enumDataType.Double:
dstDataProvider = converter.ConvertDataType <Double, float>(fpm.Prd.fileName, enumDataType.Float, dstFilename, (v) => { return((float)(v / fpm.Zoom)); });
break;
case enumDataType.Int16:
dstDataProvider = converter.ConvertDataType <Int16, float>(fpm.Prd.fileName, enumDataType.Float, dstFilename, (v) => { return((float)(v / fpm.Zoom)); });
break;
case enumDataType.Int32:
dstDataProvider = converter.ConvertDataType <Int32, float>(fpm.Prd.fileName, enumDataType.Float, dstFilename, (v) => { return((float)(v / fpm.Zoom)); });
break;
case enumDataType.Int64:
dstDataProvider = converter.ConvertDataType <Int64, float>(fpm.Prd.fileName, enumDataType.Float, dstFilename, (v) => { return((float)(v / fpm.Zoom)); });
break;
case enumDataType.UInt16:
dstDataProvider = converter.ConvertDataType <UInt16, float>(fpm.Prd.fileName, enumDataType.Float, dstFilename, (v) => { return((float)(v / fpm.Zoom)); });
//dstDataProvider = converter.ConvertDataType<UInt16, UInt16>(fpm.Prd.fileName, enumDataType.Float, dstFilename, (v) => { return (UInt16)(v / fpm.Zoom); });
break;
case enumDataType.UInt32:
dstDataProvider = converter.ConvertDataType <UInt32, float>(fpm.Prd.fileName, enumDataType.Float, dstFilename, (v) => { return((float)(v / fpm.Zoom)); });
break;
case enumDataType.UInt64:
dstDataProvider = converter.ConvertDataType <UInt64, float>(fpm.Prd.fileName, enumDataType.Float, dstFilename, (v) => { return((float)(v / fpm.Zoom)); });
break;
case enumDataType.Float:
dstDataProvider = converter.ConvertDataType <float, float>(fpm.Prd.fileName, enumDataType.Float, dstFilename, (v) => { return((float)(v / fpm.Zoom)); });
break;
}
//dstDataProvider = CreatDstDataProvider(fpm, dstFilename);
fpm.Prd.Dispose();
fpm.Prd = dstDataProvider;
fpm.Filename = dstDataProvider.fileName;
prdList.Add(dstDataProvider);
}
return(new VirtualRasterDataProvider(prdList.ToArray()));
}