/// <summary>
/// 0、先生成目标文件，以防止目标空间不足。
/// 1、计算查找表
/// 2、对所有波段执行投影
/// </summary>
private void ProjectToLDF(IRasterDataProvider srcRaster, FY3_VIRR_PrjSettings prjSettings, ISpatialReference dstSpatialRef, Action <int, string> progressCallback)
{
string outFormat = prjSettings.OutFormat;
string outfilename = prjSettings.OutPathAndFileName;
string dstProj4 = dstSpatialRef.ToProj4String();
List <BandMap> bandMaps = prjSettings.BandMapTable;
int dstBandCount = bandMaps.Count;
Size srcSize = new Size(srcRaster.Width, srcRaster.Height);
Size dstSize = prjSettings.OutSize;
using (IRasterDataDriver drv = GeoDataDriver.GetDriverByName("LDF") as IRasterDataDriver)
{
PrjEnvelope dstEnvelope = prjSettings.OutEnvelope;
string mapInfo = "MAPINFO={" + 1 + "," + 1 + "}:{" + dstEnvelope.MinX + "," + dstEnvelope.MaxY + "}:{" + prjSettings.OutResolutionX + "," + prjSettings.OutResolutionY + "}";
using (IRasterDataProvider prdWriter = drv.Create(outfilename, dstSize.Width, dstSize.Height, dstBandCount,
enumDataType.UInt16, "INTERLEAVE=BSQ", "VERSION=LDF", "SPATIALREF=" + dstProj4, mapInfo, "WITHHDR=TRUE") as IRasterDataProvider)
{
//计算查找表
//ISpatialReference srcSpatialRef = srcRaster.SpatialRef;
UInt16[] dstRowLookUpTable = new UInt16[dstSize.Width * dstSize.Height];
UInt16[] dstColLookUpTable = new UInt16[dstSize.Width * dstSize.Height];
_rasterProjector.ComputeIndexMapTable(_xs, _ys, srcSize, dstSize, dstEnvelope, _maxPrjEnvelope,
out dstRowLookUpTable, out dstColLookUpTable, progressCallback);
//执行投影
UInt16[] srcBandData = new UInt16[srcSize.Width * srcSize.Height];
UInt16[] dstBandData = new UInt16[dstSize.Width * dstSize.Height];
int progress = 0;
for (int i = 0; i < dstBandCount; i++) //读取原始通道值，投影到目标区域
{
if (progressCallback != null)
{
progress = (int)((i + 1) * 100 / dstBandCount);
progressCallback(progress, string.Format("投影第{0}共{1}通道", i + 1, dstBandCount));
}
BandMap bandMap = bandMaps[i];
ReadBandData(srcBandData, bandMap.File, bandMap.DatasetName, bandMap.BandIndex, srcSize);
if (prjSettings.IsRadiation)
{
DoRadiation(srcBandData, srcSize, bandMap.DatasetName, bandMap.BandIndex, prjSettings.IsSolarZenith);
}
_rasterProjector.Project <UInt16>(srcBandData, srcSize, dstRowLookUpTable, dstColLookUpTable, dstSize, dstBandData, 0, progressCallback);
using (IRasterBand band = prdWriter.GetRasterBand(i + 1))
{
unsafe
{
fixed(UInt16 *ptr = dstBandData)
{
IntPtr bufferPtr = new IntPtr(ptr);
band.Write(0, 0, band.Width, band.Height, bufferPtr, enumDataType.UInt16, band.Width, band.Height);
}
}
}
}
}
}
}
/// <summary>
/// 0、先生成目标文件，以防止目标空间不足。
/// 1、计算查找表
/// 2、读取通道数据
/// 3、计算通道数据亮温
/// 4、投影通道。
/// </summary>
private void ProjectToLDF(IRasterDataProvider srcRaster, NOAA_PrjSettings prjSettings, ISpatialReference dstSpatialRef, Action <int, string> progressCallback)
{
string outFormat = prjSettings.OutFormat;
string outfilename = prjSettings.OutPathAndFileName;
string dstProj4 = dstSpatialRef.ToProj4String();
int[] outBandNos = prjSettings.OutBandNos;
int dstBandCount = outBandNos.Length;
Size srcSize = new Size(srcRaster.Width, srcRaster.Height);
Size dstSize = prjSettings.OutSize;
Size srcJdSize = srcSize;
using (IRasterDataDriver drv = GeoDataDriver.GetDriverByName("LDF") as IRasterDataDriver)
{
PrjEnvelope dstEnvelope = prjSettings.OutEnvelope;
string[] options = new string[] {
"INTERLEAVE=BSQ",
"VERSION=LDF",
"WITHHDR=TRUE",
"SPATIALREF=" + dstSpatialRef.ToProj4String(),
"MAPINFO={" + 1 + "," + 1 + "}:{" + dstEnvelope.MinX + "," + dstEnvelope.MaxY + "}:{" + prjSettings.OutResolutionX + "," + prjSettings.OutResolutionY + "}"
, "BANDNAMES=" + BandNameString(prjSettings.OutBandNos)
};
if (progressCallback != null)
{
progressCallback(6, "生成输出文件");
}
using (IRasterDataProvider prdWriter = drv.Create(outfilename, dstSize.Width, dstSize.Height, dstBandCount, enumDataType.UInt16, options) as IRasterDataProvider)
{
float outResolutionX = prjSettings.OutResolutionX;
float outResolutionY = prjSettings.OutResolutionY;
Size outSize = dstEnvelope.GetSize(outResolutionX, outResolutionY);
int blockXNum = 0;
int blockYNum = 0;
int blockWidth = 0;
int blockHeight = 0;
GetBlockNumber(outSize, out blockXNum, out blockYNum, out blockWidth, out blockHeight);
Size dstBlockSize = new Size(blockWidth, blockHeight);
UInt16[] dstRowBlockLUT = new UInt16[blockWidth * blockHeight];
UInt16[] dstColBlockLUT = new UInt16[blockWidth * blockHeight];
int blockCount = blockYNum * blockXNum;
int progress = 0;
int percent = 0;
int progressCount = blockCount * dstBandCount;
for (int blockYIndex = 0; blockYIndex < blockYNum; blockYIndex++)
{
for (int blockXIndex = 0; blockXIndex < blockXNum; blockXIndex++)
{
PrjEnvelope blockEnvelope = null;
Block orbitBlock = null; //经纬度数据集，计算轨道数据范围偏移
double[] blockOrbitXs = null;
double[] blockOrbitYs = null;
if (blockCount == 1) //没分块的情况
{
orbitBlock = _orbitBlock;
if (_orbitBlock.Width == srcJdSize.Width && _orbitBlock.Height == srcJdSize.Height)
{
blockOrbitXs = _xs;
blockOrbitYs = _ys;
}
else //源
{
GetBlockDatas(_xs, _ys, srcJdSize.Width, srcJdSize.Height, orbitBlock.xOffset, orbitBlock.yBegin, orbitBlock.Width, orbitBlock.Height, out blockOrbitXs, out blockOrbitYs);
}
blockEnvelope = dstEnvelope;
}
else
{
//当前块的四角范围
double blockMinX = dstEnvelope.MinX + blockWidth * outResolutionX * blockXIndex;
double blockMaxX = blockMinX + blockWidth * outResolutionX;
double blockMaxY = dstEnvelope.MaxY - blockHeight * outResolutionY * blockYIndex;
double blockMinY = blockMaxY - blockHeight * outResolutionY;
blockEnvelope = new PrjEnvelope(blockMinX, blockMaxX, blockMinY, blockMaxY);
//根据当前输出块，反推出对应的源数据块起始行列
GetEnvelope(_xs, _ys, srcJdSize.Width, srcJdSize.Height, blockEnvelope, out orbitBlock);
if (orbitBlock.Width <= 0 || orbitBlock.Height <= 0) //当前分块不在图像内部
{
progress += dstBandCount;
continue;
}
GetBlockDatas(_xs, _ys, srcJdSize.Width, srcJdSize.Height, orbitBlock.xOffset, orbitBlock.yBegin, orbitBlock.Width, orbitBlock.Height, out blockOrbitXs, out blockOrbitYs);
}
float[] solarZenithData = null;
if (prjSettings.IsRadiation && prjSettings.IsSolarZenith)
{
if (File.Exists(_szDataFilename))
{
ReadBandData(out solarZenithData, _solarZenithCacheRaster, 1, orbitBlock.xOffset, orbitBlock.yBegin, orbitBlock.Width, orbitBlock.Height);
}
TryReadZenithData(orbitBlock.xOffset, orbitBlock.yBegin, orbitBlock.Width, orbitBlock.Height);
}
Size orbitBlockSize = new Size(orbitBlock.Width, orbitBlock.Height);
_rasterProjector.ComputeIndexMapTable(blockOrbitXs, blockOrbitYs, orbitBlockSize, dstBlockSize, blockEnvelope, _maxPrjEnvelope, out dstRowBlockLUT, out dstColBlockLUT, null);
//执行投影
UInt16[] srcBandData = new UInt16[orbitBlock.Width * orbitBlock.Height];
UInt16[] dstBandData = new UInt16[blockWidth * blockHeight];
for (int i = 0; i < dstBandCount; i++) //读取原始通道值，投影到目标区域
{
if (progressCallback != null)
{
progress++;
percent = progress * 100 / progressCount;
progressCallback(percent, string.Format("投影第{0}/{1}块,第{2}/{3}通道", blockXIndex + blockYIndex, blockCount, i + 1, dstBandCount));
}
int bandNo = outBandNos[i];
ReadBandData(srcBandData, srcRaster, bandNo, orbitBlock.xOffset, orbitBlock.yBegin, orbitBlock.Width, orbitBlock.Height);
if (prjSettings.IsRadiation)
{
DoRadiation(srcBandData, orbitBlock.xOffset, orbitBlock.yBegin, orbitBlock.Size, bandNo, prjSettings.IsRadiation, prjSettings.IsSolarZenith, solarZenithData);
}
_rasterProjector.Project <UInt16>(srcBandData, orbitBlock.Size, dstRowBlockLUT, dstColBlockLUT, dstBlockSize, dstBandData, 0, null);
IRasterBand band = prdWriter.GetRasterBand(i + 1);
{
unsafe
{
fixed(UInt16 *ptr = dstBandData)
{
IntPtr bufferPtr = new IntPtr(ptr);
int blockOffsetY = blockYIndex * dstBlockSize.Height;
int blockOffsetX = blockXIndex * dstBlockSize.Width;
band.Write(blockOffsetX, blockOffsetY, blockWidth, blockHeight, bufferPtr, enumDataType.UInt16, blockWidth, blockHeight);
}
}
}
}
ReleaseZenithData();
srcBandData = null;
dstBandData = null;
blockOrbitXs = null;
blockOrbitYs = null;
}
}
dstRowBlockLUT = null;
dstColBlockLUT = null;
}
}
}