/// <summary>
/// TIN数据转栅格数据并进行坡度分析 张琪 20110614
/// </summary>
/// <param name="pTinAdvanced"></param>
/// <param name="pRastConvType"></param>
/// <param name="sDir"></param>
/// <param name="sName"></param>
/// <param name="ePixelType"></param>
/// <param name="cellsize"></param>
/// <param name="pExtent"></param>
/// <param name="bPerm"></param>
/// <param name="strType"></param>
/// <returns></returns>
public IRasterDataset TinToRaster(ITinAdvanced pTinAdvanced, esriRasterizationType pRastConvType, String sDir, String sName, rstPixelType ePixelType, Double cellsize, IEnvelope pExtent, bool bPerm, String strType)
{
try
{
ESRI.ArcGIS.Geometry.IPoint pOrigin = pExtent.LowerLeft;
pOrigin.X = pOrigin.X - (cellsize * 0.5);
pOrigin.Y = pOrigin.Y - (cellsize * 0.5);
int nCol, nRow;
nCol = Convert.ToInt32(Math.Round(pExtent.Width / cellsize)) + 1;
nRow = Convert.ToInt32(Math.Round(pExtent.Height / cellsize)) + 1;
IGeoDataset pGeoDataset = pTinAdvanced as IGeoDataset;
ISpatialReference2 pSpatialReference2 = pGeoDataset.SpatialReference as ISpatialReference2;
IRasterDataset pRasterDataset = CreateRasterSurf(sDir, sName, strType, pOrigin, nCol, nRow, cellsize, cellsize, ePixelType, pSpatialReference2, bPerm);
IRawPixels pRawPixels = GetRawPixels(pRasterDataset, 0);
object pCache = pRawPixels.AcquireCache();
ITinSurface pTinSurface = pTinAdvanced as ITinSurface;
IGeoDatabaseBridge2 pbridge2 = (IGeoDatabaseBridge2) new GeoDatabaseHelperClass();
IRasterProps pRasterProps = pRawPixels as IRasterProps;
//float nodataFloat;
//int nodataInt;
double dZMin = pTinAdvanced.Extent.ZMin;
object vNoData;
if (ePixelType.ToString() == "PT_FLOAT")
{
vNoData = (dZMin - 1).ToString();
}
else
{
vNoData = Convert.ToInt32((dZMin - 1));
}
pRasterProps.NoDataValue = vNoData;
IPnt pOffset = new DblPntClass();
int lMaxBlockX = 2048;
if (nCol < lMaxBlockX)
{
lMaxBlockX = nCol;
}
int lMaxBlockY = 2048;
if (nRow < lMaxBlockY)
{
lMaxBlockY = nRow;
}
IPnt pBlockSize = new DblPntClass();
pBlockSize.X = lMaxBlockX;
pBlockSize.Y = lMaxBlockY;
IPixelBlock3 pPixelBlock = pRawPixels.CreatePixelBlock(pBlockSize) as IPixelBlock3;
object blockArray = pPixelBlock.get_PixelDataByRef(0);
ITrackCancel pCancel = new CancelTrackerClass();
pCancel.CancelOnClick = false;
pCancel.CancelOnKeyPress = true;
int lBlockCount = Convert.ToInt32(Math.Round((nCol / lMaxBlockX) + 0.49) * Math.Round((nRow / lMaxBlockY) + 0.49));
ESRI.ArcGIS.Geometry.IPoint pBlockOrigin = new ESRI.ArcGIS.Geometry.PointClass();
int lColOffset, lRowOffset;
for (lRowOffset = 0; lRowOffset < (nRow - 1);)
{
for (lColOffset = 0; lColOffset < (nCol - 1);)
{
if ((nCol - lColOffset) < lMaxBlockX)
{
pBlockSize.X = (nCol - lColOffset);
pPixelBlock = pRawPixels.CreatePixelBlock(pBlockSize) as IPixelBlock3;
blockArray = pPixelBlock.get_PixelDataByRef(0);
}
pBlockOrigin.X = pOrigin.X + (lColOffset * cellsize) + (cellsize * 0.5);
pBlockOrigin.Y = pOrigin.Y + ((nRow - lRowOffset) * cellsize) - (cellsize * 0.5);
pbridge2.QueryPixelBlock(pTinSurface, pBlockOrigin.X, pBlockOrigin.Y, cellsize, cellsize, pRastConvType, vNoData, ref blockArray);
//pTinSurface.QueryPixelBlock(pBlockOrigin.X, pBlockOrigin.Y, cellsize, cellsize, pRastConvType, vNoData, blockArray);
pOffset.X = lColOffset;
pOffset.Y = lRowOffset;
pPixelBlock.set_PixelData(0, (System.Object)blockArray);
pRawPixels.Write(pOffset, pPixelBlock as IPixelBlock);
if (lBlockCount > 1)
{
if (!pCancel.Continue())
{
break;
}
else if (pTinAdvanced.ProcessCancelled)
{
break;
}
}
lColOffset = lColOffset + lMaxBlockX;
}
bool bReset = false;
if (pBlockSize.X != lMaxBlockX)
{
pBlockSize.X = lMaxBlockX;
bReset = true;
}
if ((nRow - lRowOffset) < lMaxBlockY)
{
pBlockSize.Y = (nRow - lRowOffset);
bReset = true;
}
if (bReset)
{
pPixelBlock.set_PixelData(0, blockArray);
pPixelBlock = pRawPixels.CreatePixelBlock(pBlockSize) as IPixelBlock3;
blockArray = pPixelBlock.get_PixelDataByRef(0);
}
lRowOffset = lRowOffset + lMaxBlockY;
}
pRawPixels.ReturnCache(pCache);
pCache = null;
pRawPixels = null;
pPixelBlock = null;
pRasterProps = null;
blockArray = 0;
pRasterDataset = OpenRasterDataset(sDir, sName);
if (lBlockCount == 1)
{
pTinAdvanced.TrackCancel = null;
}
return(pRasterDataset);
}
catch
{
return(null);
}
}
public IRasterDataset TinToRaster2(ITinAdvanced pTinAdvanced, esriRasterizationType pRastConvType, String sDir, String sName, rstPixelType ePixelType, Double cellsize, IEnvelope pExtent, bool bPerm, String strType)
{
try
{
ESRI.ArcGIS.Geometry.IPoint pOrigin = pExtent.LowerLeft;
pOrigin.X = pOrigin.X - (cellsize * 0.5);
pOrigin.Y = pOrigin.Y - (cellsize * 0.5);
int nCol, nRow;
nCol = Convert.ToInt32(Math.Round(pExtent.Width / cellsize)) + 1;
nRow = Convert.ToInt32(Math.Round(pExtent.Height / cellsize)) + 1;
IGeoDataset pGeoDataset = pTinAdvanced as IGeoDataset;
ISpatialReference2 pSpatialReference2 = pGeoDataset.SpatialReference as ISpatialReference2;
IRasterDataset pRasterDataset = CreateRasterSurf(sDir, sName, strType, pOrigin, nCol, nRow, cellsize, cellsize, ePixelType, pSpatialReference2, bPerm);
IRawPixels pRawPixels = GetRawPixels(pRasterDataset, 0);
IPnt pBlockSize = new DblPntClass();
pBlockSize.X = nCol;
pBlockSize.Y = nRow;
IPixelBlock3 pPixelBlock = pRawPixels.CreatePixelBlock(pBlockSize) as IPixelBlock3;
object blockArray = pPixelBlock.get_PixelDataByRef(0);
ITinSurface pTinSurface = pTinAdvanced as ITinSurface;
IGeoDatabaseBridge2 pbridge2 = (IGeoDatabaseBridge2) new GeoDatabaseHelperClass();
IRasterProps pRasterProps = pRawPixels as IRasterProps;
object nodataFloat;
object nodataInt;
pOrigin.X = pOrigin.X + (cellsize * 0.5);
pOrigin.Y = pOrigin.Y + (cellsize * nRow) - (cellsize * 0.5);
if (ePixelType.ToString() == "PT_FLOAT")
{
nodataFloat = pRasterProps.NoDataValue;
pTinSurface.QueryPixelBlock(pOrigin.X, pOrigin.Y, cellsize, cellsize, pRastConvType, nodataFloat, blockArray);
}
else
{
nodataInt = pRasterProps.NoDataValue;
pTinSurface.QueryPixelBlock(pOrigin.X, pOrigin.Y, cellsize, cellsize, pRastConvType, nodataInt, blockArray);
}
if (pTinAdvanced.ProcessCancelled == false)
{
return(null);
}
IPnt pOffset = new DblPntClass();
pOffset.X = 0;
pOffset.Y = 0;
pRawPixels.Write(pOffset, pPixelBlock as IPixelBlock);
if (!bPerm && ePixelType.ToString() == "PT_FLOAT")
{
IRasterBand pBand = pRawPixels as IRasterBand;
IRasterStatistics pStats = pBand.Statistics;
pStats.Recalculate();
}
if (bPerm)
{
pRawPixels = null;
pPixelBlock = null;
pRasterProps = null;
blockArray = 0;
pRasterDataset = OpenRasterDataset(sDir, sName);
}
return(pRasterDataset);
}
catch
{
return(null);
}
}
public IRasterDataset TinToRaster_new(ITinAdvanced pTin, esriRasterizationType eRastConvType, String sDir, String sName, rstPixelType ePixelType, Double cellsize, IEnvelope pExtent, bool bPerm)
{
IPoint pOrigin = pExtent.LowerLeft;
//pOrigin.X = pOrigin.X - (cellsize * 0.5);
//pOrigin.Y = pOrigin.Y - (cellsize * 0.5);
pOrigin.X = pOrigin.X;
pOrigin.Y = pOrigin.Y;
int nCol, nRow;
nCol = (int)Math.Round(pExtent.Width / cellsize);
nRow = (int)Math.Round(pExtent.Height / cellsize);
IGeoDataset pGDS = pTin as IGeoDataset;
ISpatialReference2 pSR = pGDS.SpatialReference as ISpatialReference2;
//这个pOrigin为栅格左下角
IWorkspaceFactory pworkspaceFactory = new RasterWorkspaceFactory();
IRasterWorkspace2 rasterws = pworkspaceFactory.OpenFromFile(sDir, 0) as IRasterWorkspace2;
IPoint originpoint = pOrigin;
//用于计算的 float型的栅格数据
IRasterDataset demdataset = rasterws.CreateRasterDataset(sName, "TIFF", originpoint, nCol, nRow,
cellsize, cellsize, 1, rstPixelType.PT_DOUBLE, null, true);
IRasterDataset pRDS = demdataset;
//IRawPixels pRawPixels = GetRawPixels(pRDS, 0);
IRaster pRaster = pRDS.CreateDefaultRaster();
IPnt pBlockSize = new DblPnt();
//nCol = 50;
//nRow = 50;
pBlockSize.X = nCol;
pBlockSize.Y = nRow;
IPixelBlock pPixelBlock = pRaster.CreatePixelBlock(pBlockSize);
//IPixelBlock pPixelBlock = pRawPixels.CreatePixelBlock(pBlockSize);
IPixelBlock3 pPixelBlock3 = pPixelBlock as IPixelBlock3;
//object val = pPixelBlock.get_SafeArray(0);
ITinSurface pTinSurf = pTin as ITinSurface;
// IRasterProps pRasterProps = pRawPixels as IRasterProps;
IRasterProps pRasterProps = pRaster as IRasterProps;
object nodata;
//pOrigin.X = pOrigin.X + (cellsize * 0.5);
//pOrigin.Y = pOrigin.Y + (cellsize * nRow) - (cellsize * 0.5);
pOrigin.X = pOrigin.X;
pOrigin.Y = pOrigin.Y + (cellsize * nRow);
nodata = pRasterProps.NoDataValue;
IGeoDatabaseBridge2 pbridge2 = (IGeoDatabaseBridge2) new GeoDatabaseHelperClass();
//这个pOrigin为栅格左上角
//pbridge2.QueryPixelBlock(pTinSurf, pOrigin.X, pOrigin.Y, cellsize, cellsize, esriRasterizationType.esriElevationAsRaster, nodata, ref val);
//if (pTin.ProcessCancelled)
// return null;
//val.GetType();
CalPixelArray(pTinSurf, pOrigin.X, pOrigin.Y, cellsize, cellsize, ref pPixelBlock3);
IPnt pOffset = new DblPnt();
pOffset.X = 0;
pOffset.Y = 0;
//pPixelBlock3.set_PixelData(0, val);
//pRawPixels.Write(pOffset, (IPixelBlock)pPixelBlock3);//写入硬盘
IRasterEdit prasteredit = pRaster as IRasterEdit;
prasteredit.Write(pOffset, (IPixelBlock)pPixelBlock3);
//pRDS = OpenOutputRasterDataset(sDir, sName);
//IPixelBlock pb = pRaster.CreatePixelBlock(pBlockSize);
//pRaster.Read(pOffset,pb);
// ISaveAs pSaveas = pRasterProps as ISaveAs2;
// pSaveas.SaveAs(sDir + "\\" + sName, null, "TIFF");
prasteredit.Refresh();
return(pRDS);
}
public static IRasterDataset TinToRaster(ITinAdvanced itinAdvanced_0,
esriRasterizationType esriRasterizationType_0, string string_0, string string_1, string string_2,
rstPixelType rstPixelType_0, double double_0, IEnvelope ienvelope_0, bool bool_0)
{
object obj3;
IPoint lowerLeft = ienvelope_0.LowerLeft;
lowerLeft.X -= double_0 * 0.5;
lowerLeft.Y -= double_0 * 0.5;
int num = ((int)Math.Round((double)(ienvelope_0.Width / double_0))) + 1;
int num2 = ((int)Math.Round((double)(ienvelope_0.Height / double_0))) + 1;
IGeoDataset dataset = itinAdvanced_0 as IGeoDataset;
ISpatialReference2 spatialReference = dataset.SpatialReference as ISpatialReference2;
IRasterDataset dataset2 = CreateRasterSurf(string_0, string_1, string_2, lowerLeft, num, num2, double_0,
double_0, 1, rstPixelType_0, spatialReference, bool_0);
IRawPixels rawPixels = GetRawPixels(dataset2, 0);
object cache = rawPixels.AcquireCache();
ITinSurface pSurface = itinAdvanced_0 as ITinSurface;
IRasterProps o = rawPixels as IRasterProps;
double zMin = itinAdvanced_0.Extent.ZMin;
if (rstPixelType_0 == rstPixelType.PT_FLOAT)
{
obj3 = (float)(zMin - 1.0);
}
else
{
obj3 = (int)(zMin - 1.0);
}
o.NoDataValue = obj3;
IPnt tlc = new DblPnt();
int num4 = 2048;
if (num < 2048)
{
num4 = num;
}
int num5 = 2048;
if (num2 < 2048)
{
num5 = num2;
}
IPnt size = new DblPnt
{
X = num4,
Y = num5
};
IPixelBlock3 block = rawPixels.CreatePixelBlock(size) as IPixelBlock3;
ITrackCancel cancel = new CancelTracker
{
CancelOnClick = false,
CancelOnKeyPress = true
};
int num6 = (int)(Math.Round((double)((num / num4) + 0.49)) * Math.Round((double)((num2 / num5) + 0.49)));
if (num6 == 1)
{
itinAdvanced_0.TrackCancel = cancel;
}
IPoint point2 = new Point();
object obj4 = block.get_PixelDataByRef(0);
for (int i = 0; i < num2; i += num5)
{
for (int j = 0; j < num; j += num4)
{
if ((num - j) < num4)
{
size.X = num - j;
block = rawPixels.CreatePixelBlock(size) as IPixelBlock3;
obj4 = block.get_PixelDataByRef(0);
}
point2.X = (lowerLeft.X + (j * double_0)) + (double_0 * 0.5);
point2.Y = (lowerLeft.Y + ((num2 - i) * double_0)) - (double_0 * 0.5);
IGeoDatabaseBridge2 bridge = new GeoDatabaseHelper() as IGeoDatabaseBridge2;
bridge.QueryPixelBlock(pSurface, point2.X, point2.Y, double_0, double_0, esriRasterizationType_0,
obj3, ref obj4);
tlc.X = j;
tlc.Y = i;
block.set_PixelData(0, obj4);
rawPixels.Write(tlc, block as IPixelBlock);
}
bool flag = false;
if (size.X != num4)
{
size.X = num4;
flag = true;
}
if ((num2 - i) < num5)
{
size.Y = num2 - i;
flag = true;
}
if (flag)
{
block = rawPixels.CreatePixelBlock(size) as IPixelBlock3;
obj4 = block.get_PixelDataByRef(0);
}
}
rawPixels.ReturnCache(cache);
Marshal.ReleaseComObject(cache);
cache = null;
Marshal.ReleaseComObject(rawPixels);
rawPixels = null;
Marshal.ReleaseComObject(block);
block = null;
Marshal.ReleaseComObject(o);
o = null;
obj4 = 0;
GC.Collect();
return(dataset2);
}
public static IRasterDataset TinToRaster(ITinAdvanced itinAdvanced_0,
esriRasterizationType esriRasterizationType_0, string string_0, string string_1, rstPixelType rstPixelType_0,
double double_0, IEnvelope ienvelope_0, bool bool_0)
{
IPoint lowerLeft = ienvelope_0.LowerLeft;
lowerLeft.X -= double_0 * 0.5;
lowerLeft.Y -= double_0 * 0.5;
int num = (int)Math.Round((double)((ienvelope_0.Width / double_0) + 1.0));
int num2 = (int)Math.Round((double)((ienvelope_0.Height / double_0) + 1.0));
IGeoDataset dataset = itinAdvanced_0 as IGeoDataset;
ISpatialReference2 spatialReference = dataset.SpatialReference as ISpatialReference2;
IRasterDataset dataset2 = CreateRasterSurf(string_0, string_1, "GRID", lowerLeft, num, num2, double_0,
double_0, rstPixelType_0, spatialReference, true);
IRasterBandCollection bands = dataset2 as IRasterBandCollection;
IRawPixels pixels = bands.Item(0) as IRawPixels;
ITinSurface pSurface = itinAdvanced_0 as ITinSurface;
pSurface.RasterInterpolationMethod = esriSurfaceInterpolationType.esriNaturalNeighborInterpolation;
IRasterProps props = pixels as IRasterProps;
object noDataValue = props.NoDataValue;
IPnt tlc = new DblPnt();
int num3 = 2048;
int num4 = 2048;
if (num < 2048)
{
num3 = num;
}
if (num2 < num4)
{
num4 = num2;
}
IPnt size = new DblPnt
{
X = num3,
Y = num4
};
IPixelBlock pxls = pixels.CreatePixelBlock(size);
object block = pxls.get_SafeArray(0);
IPoint point2 = new Point();
for (int i = 0; i < num2; i += num4)
{
for (int j = 0; j < num; j += num3)
{
if ((num - j) < num3)
{
size.X = num - j;
pxls = pixels.CreatePixelBlock(size);
block = pxls.get_SafeArray(0);
}
point2.X = (lowerLeft.X + (j * double_0)) + (double_0 * 0.5);
point2.Y = (lowerLeft.Y + ((num2 - i) * double_0)) - (double_0 * 0.5);
IGeoDatabaseBridge2 bridge = new GeoDatabaseHelper() as IGeoDatabaseBridge2;
bridge.QueryPixelBlock(pSurface, point2.X, point2.Y, double_0, double_0, esriRasterizationType_0,
noDataValue, ref block);
tlc.X = j;
tlc.Y = i;
pxls.set_SafeArray(0, block);
pixels.Write(tlc, pxls);
}
bool flag = false;
if (size.X != num3)
{
size.X = num3;
flag = true;
}
if ((num2 - i) < num4)
{
size.Y = num2 - i;
}
if (flag)
{
block = pixels.CreatePixelBlock(size).get_SafeArray(0);
}
}
return(dataset2);
}
public static void QueryPixelBlock(ITinSurface itinSurface_0, double double_0, double double_1, double double_2,
double double_3, esriRasterizationType esriRasterizationType_0, object object_0, object object_1)
{
int length = ((float[, ])object_1).GetLength(0);
int num2 = ((float[, ])object_1).GetLength(1);
IPoint pPoint = new Point();
int num3 = 0;
Label_0024:
if (num3 >= num2)
{
return;
}
int num4 = 0;
while (true)
{
if (num4 < length)
{
pPoint.X = double_0 + (num4 * double_2);
pPoint.Y = double_1 - (num3 * double_3);
float slopeDegrees = 0f;
try
{
switch (esriRasterizationType_0)
{
case esriRasterizationType.esriDegreeSlopeAsRaster:
slopeDegrees = (float)itinSurface_0.GetSlopeDegrees(pPoint);
break;
case esriRasterizationType.esriPercentageSlopeAsRaster:
slopeDegrees = (float)itinSurface_0.GetSlopePercent(pPoint);
break;
case esriRasterizationType.esriDegreeAspectAsRaster:
slopeDegrees = (float)itinSurface_0.GetAspectDegrees(pPoint);
break;
case esriRasterizationType.esriElevationAsRaster:
slopeDegrees = (float)itinSurface_0.GetElevation(pPoint);
break;
}
if (!double.IsNaN((double)slopeDegrees))
{
((float[, ])object_1)[num4, num3] = slopeDegrees;
}
else
{
((float[, ])object_1)[num4, num3] = (float)object_0;
}
}
catch
{
}
}
else
{
num3++;
goto Label_0024;
}
num4++;
}
}
