public IRasterBand[] Clip(IRasterBand srcBand, BlockDef[] blockDefs, int samplePercent, string driver, Action <int, string> progressCallback, params object[] options) { if (blockDefs.Length == 0 || blockDefs == null || srcBand == null) { return(null); } IRasterBand[] targetBands = new IRasterBand[blockDefs.Length]; int blockNums = 0; foreach (BlockDef it in blockDefs) { int tBeginRow = -1, tEndRow = -1, tBeginCol = -1, tEndCol = -1; int oBeginRow = -1, oEndRow = -1, oBeginCol = -1, oEndCol = -1; CoordEnvelope oEnvelope = srcBand.CoordEnvelope; CoordEnvelope tEnvelope = it.ToEnvelope(); Size oSize = new Size(srcBand.Width, srcBand.Height); Size tSize = ClipCutHelper.GetTargetSize(it, srcBand.ResolutionX, srcBand.ResolutionY); bool isInternal = new RasterMoasicClipHelper().ComputeBeginEndRowCol(oEnvelope, oSize, tEnvelope, tSize, ref oBeginRow, ref oBeginCol, ref oEndRow, ref oEndCol, ref tBeginRow, ref tBeginCol, ref tEndRow, ref tEndCol); IRasterDataDriver rasterDriver = GeoDataDriver.GetDriverByName(driver) as IRasterDataDriver; //targetBands[blockNums] = ; blockNums++; } return(targetBands); }
public IRasterDataProvider[] Clip(IRasterDataProvider srcRaster, BlockDef[] blockDefs, int samplePercent, string driver, string outdir, Action <int, string> progressCallback, params object[] options) { IRasterDataProvider[] tProviders = new IRasterDataProvider[blockDefs.Length]; if (progressCallback != null) { progressCallback(0, "开始数据分幅"); } for (int blockNums = 0; blockNums < blockDefs.Length; blockNums++) { if (progressCallback != null) { progressCallback((int)((blockNums + 1.0) / blockDefs.Length * 100), string.Format("正在分幅第{0}/{1}个文件...", (blockNums + 1).ToString(), blockDefs.Length)); } //位置映射参数 int tBeginRow = -1, tEndRow = -1, tBeginCol = -1, tEndCol = -1; int oBeginRow = -1, oEndRow = -1, oBeginCol = -1, oEndCol = -1; CoordEnvelope oEnvelope = srcRaster.CoordEnvelope; CoordEnvelope tEnvelope = blockDefs[blockNums].ToEnvelope(); Size oSize = new Size(srcRaster.Width, srcRaster.Height); Size tSize = ClipCutHelper.GetTargetSize(blockDefs[blockNums], srcRaster.ResolutionX, srcRaster.ResolutionY); bool isInternal = new RasterMoasicClipHelper().ComputeBeginEndRowCol(oEnvelope, oSize, tEnvelope, tSize, ref oBeginRow, ref oBeginCol, ref oEndRow, ref oEndCol, ref tBeginRow, ref tBeginCol, ref tEndRow, ref tEndCol); string blockFilename = ClipCutHelper.GetBlockFilename(blockDefs[blockNums], srcRaster.fileName, outdir, driver); IRasterDataDriver rasterDriver = GeoDataDriver.GetDriverByName(driver) as IRasterDataDriver; int oWidth = 0; int oHeight = 0; float tResolutionX; float tResolutionY; if (samplePercent > 0 && samplePercent < 100) { oHeight = (int)(tSize.Width * samplePercent * 1f / 100 + 0.5); oWidth = (int)(tSize.Width * samplePercent * 1f / 100 + 0.5); tResolutionX = srcRaster.ResolutionX * samplePercent * 1f / 100; tResolutionY = srcRaster.ResolutionY * samplePercent * 1f / 100; } else { oHeight = tSize.Height; oWidth = tSize.Width; tResolutionX = srcRaster.ResolutionX; tResolutionY = srcRaster.ResolutionY; } string[] optionString = new string[] { "INTERLEAVE=BSQ", "VERSION=LDF", "WITHHDR=TRUE", "SPATIALREF=" + srcRaster.SpatialRef.ToProj4String(), "MAPINFO={" + 1 + "," + 1 + "}:{" + tEnvelope.MinX + "," + tEnvelope.MaxY + "}:{" + tResolutionX + "," + tResolutionY + "}" }; tProviders[blockNums] = rasterDriver.Create(blockFilename, oWidth, oHeight, srcRaster.BandCount, srcRaster.DataType, optionString); int rowStep = ClipCutHelper.ComputeRowStep(srcRaster, oBeginRow, oEndRow); for (int oRow = oBeginRow; oRow < oEndRow; oRow += rowStep) { if (oRow + rowStep > oEndRow) { rowStep = oEndRow - oRow; } for (int bandIndex = 1; bandIndex <= srcRaster.BandCount; bandIndex++) { int sample = (oEndCol - oBeginCol); int typeSize = ClipCutHelper.GetSize(srcRaster.DataType); int bufferSize = sample * rowStep * typeSize; byte[] databuffer = new byte[bufferSize]; unsafe { fixed(byte *ptr = databuffer) { IntPtr buffer = new IntPtr(ptr); srcRaster.GetRasterBand(bandIndex).Read(oBeginCol, oRow, sample, rowStep, buffer, srcRaster.DataType, sample, rowStep); if (samplePercent > 0 && samplePercent < 100) { tProviders[blockNums].GetRasterBand(bandIndex).Write((int)(tBeginCol * samplePercent * 1f / 100 + 0.5), (int)((tBeginRow + (oRow - oBeginRow)) * samplePercent * 1f / 100 + 0.5), (int)(sample * samplePercent * 1f / 100 + 0.5), (int)(rowStep * samplePercent * 1f / 100 + 0.5), buffer, srcRaster.DataType, (int)(sample * samplePercent * 1f / 100 + 0.5), (int)(rowStep * samplePercent * 1f / 100 + 0.5)); } else { tProviders[blockNums].GetRasterBand(bandIndex).Write(tBeginCol, tBeginRow + (oRow - oBeginRow), sample, rowStep, buffer, srcRaster.DataType, sample, rowStep); } } } } } } return(tProviders); }
public IRasterDataProvider Clip(IRasterDataProvider srcRaster, BlockDef blockDefs, int samplePercent, string driver, string outdir, Action <int, string> progressCallback, out double validPercent, params object[] options) { IRasterDataProvider tProviders = null; if (progressCallback != null) { progressCallback(0, "开始数据分幅"); } //位置映射参数 int tBeginRow = -1, tEndRow = -1, tBeginCol = -1, tEndCol = -1; int oBeginRow = -1, oEndRow = -1, oBeginCol = -1, oEndCol = -1; CoordEnvelope oEnvelope = srcRaster.CoordEnvelope; CoordEnvelope tEnvelope = blockDefs.ToEnvelope(); Size oSize = new Size(srcRaster.Width, srcRaster.Height); Size tSize = ClipCutHelper.GetTargetSize(blockDefs, srcRaster.ResolutionX, srcRaster.ResolutionY); bool isInternal = new RasterMoasicClipHelper().ComputeBeginEndRowCol(oEnvelope, oSize, tEnvelope, tSize, ref oBeginRow, ref oBeginCol, ref oEndRow, ref oEndCol, ref tBeginRow, ref tBeginCol, ref tEndRow, ref tEndCol); string blockFilename = ClipCutHelper.GetBlockFilename(blockDefs, srcRaster.fileName, outdir, driver); IRasterDataDriver rasterDriver = GeoDataDriver.GetDriverByName(driver) as IRasterDataDriver; int oWidth = 0; int oHeight = 0; float tResolutionX; float tResolutionY; if (samplePercent > 0 && samplePercent < 100) { oHeight = (int)(tSize.Width * samplePercent * 1f / 100 + 0.5); oWidth = (int)(tSize.Width * samplePercent * 1f / 100 + 0.5); tResolutionX = srcRaster.ResolutionX * samplePercent * 1f / 100; tResolutionY = srcRaster.ResolutionY * samplePercent * 1f / 100; } else { oHeight = tSize.Height; oWidth = tSize.Width; tResolutionX = srcRaster.ResolutionX; tResolutionY = srcRaster.ResolutionY; } string[] optionString = new string[] { "INTERLEAVE=BSQ", "VERSION=LDF", "WITHHDR=TRUE", "SPATIALREF=" + srcRaster.SpatialRef.ToProj4String(), "MAPINFO={" + 1 + "," + 1 + "}:{" + tEnvelope.MinX + "," + tEnvelope.MaxY + "}:{" + tResolutionX + "," + tResolutionY + "}" }; tProviders = rasterDriver.Create(blockFilename, oWidth, oHeight, srcRaster.BandCount, srcRaster.DataType, optionString); int rowStep = ClipCutHelper.ComputeRowStep(srcRaster, oBeginRow, oEndRow); int sample = (oEndCol - oBeginCol); int typeSize = ClipCutHelper.GetSize(srcRaster.DataType); long allPixelByte = sample * (oEndRow - oBeginRow) * typeSize * srcRaster.BandCount; long validPixelByte = 0; long validPer = (int)(allPixelByte * 0.1f); int stepCount = (int)((oEndRow - oBeginRow) / rowStep + 0.5) * srcRaster.BandCount; int step = 0; int percent = 0; for (int oRow = oBeginRow; oRow < oEndRow; oRow += rowStep) { if (oRow + rowStep > oEndRow) { rowStep = oEndRow - oRow; } for (int bandIndex = 1; bandIndex <= srcRaster.BandCount; bandIndex++) { step++; percent = (int)(step * 1.0f / stepCount * 100); if (progressCallback != null) { progressCallback(percent, "完成数据分幅" + percent + "%"); } int bufferSize = sample * rowStep * typeSize; byte[] databuffer = new byte[bufferSize]; unsafe { fixed(byte *ptr = databuffer) { IntPtr buffer = new IntPtr(ptr); srcRaster.GetRasterBand(bandIndex).Read(oBeginCol, oRow, sample, rowStep, buffer, srcRaster.DataType, sample, rowStep); if (validPixelByte < validPer) { foreach (byte b in databuffer) { if (b != 0) { validPixelByte++; } } } if (validPixelByte == 0) { continue; } if (samplePercent > 0 && samplePercent < 100) { tProviders.GetRasterBand(bandIndex).Write((int)(tBeginCol * samplePercent * 1f / 100 + 0.5), (int)((tBeginRow + (oRow - oBeginRow)) * samplePercent * 1f / 100 + 0.5), (int)(sample * samplePercent * 1f / 100 + 0.5), (int)(rowStep * samplePercent * 1f / 100 + 0.5), buffer, srcRaster.DataType, (int)(sample * samplePercent * 1f / 100 + 0.5), (int)(rowStep * samplePercent * 1f / 100 + 0.5)); } else { tProviders.GetRasterBand(bandIndex).Write(tBeginCol, tBeginRow + (oRow - oBeginRow), sample, rowStep, buffer, srcRaster.DataType, sample, rowStep); } } } } } validPercent = validPixelByte * 1.0d / allPixelByte; if (progressCallback != null) { progressCallback(100, "完成数据分幅"); } return(tProviders); }