public static void exportRasterData(string parth, IRasterLayer rasterLayer, float[,] rasterMat) //输出栅格数据
{
string directory = parth.Substring(0, parth.LastIndexOf("\\"));
string name = parth.Substring(parth.LastIndexOf("\\") + 1);
IWorkspaceFactory workspaceFac = new RasterWorkspaceFactoryClass();
IRasterWorkspace2 rasterWorkspace2 = workspaceFac.OpenFromFile(directory, 0) as IRasterWorkspace2;
IRasterInfo rasterInfo = (rasterLayer.Raster as IRawBlocks).RasterInfo;
IPoint originPoint = new Point();
originPoint.PutCoords(rasterInfo.Origin.X, rasterInfo.Origin.Y - (rasterLayer.Raster as IRasterProps).Height * (rasterLayer.Raster as IRasterProps).MeanCellSize().Y);
IRasterProps rasterProps = rasterLayer.Raster as IRasterProps;
IRasterDataset rasterDataSet = rasterWorkspace2.CreateRasterDataset(name, "IMAGINE Image", originPoint, rasterProps.Width, rasterProps.Height,
rasterProps.MeanCellSize().X, rasterProps.MeanCellSize().Y, 1, rstPixelType.PT_FLOAT, rasterProps.SpatialReference, true) as IRasterDataset2;
IRaster2 raster2 = rasterDataSet.CreateDefaultRaster() as IRaster2;
IPnt pntClass = new Pnt();
pntClass.X = rasterProps.Width;
pntClass.Y = rasterProps.Height;
IRasterCursor rasterCursor = raster2.CreateCursorEx(pntClass);
IRasterCursor inRasterCursor = (rasterLayer.Raster as IRaster2).CreateCursorEx(pntClass);
IRasterEdit rasterEdit = raster2 as IRasterEdit;
if (rasterEdit.CanEdit())
{
IPixelBlock3 pixelBlock3 = rasterCursor.PixelBlock as IPixelBlock3;
IPixelBlock3 inPixelBlock3 = inRasterCursor.PixelBlock as IPixelBlock3;
System.Array pixels = (System.Array)rasterMat;
pixelBlock3.set_PixelData(0, (System.Array)pixels);
rasterEdit.Write(rasterCursor.TopLeft, (IPixelBlock)pixelBlock3);
System.Runtime.InteropServices.Marshal.ReleaseComObject(pixelBlock3);
}
rasterEdit.Refresh();
IGeoDataset inDataset = rasterLayer.Raster as IGeoDataset;
IGeoDataset outDataset = rasterDataSet as IGeoDataset;
IExtractionOp op = new RasterExtractionOpClass();
var outDataset1 = op.Raster(outDataset, inDataset);
var clipRaster = (IRaster)outDataset1;
ISaveAs pSaveAs = clipRaster as ISaveAs;
System.Runtime.InteropServices.Marshal.ReleaseComObject(rasterCursor);
System.Runtime.InteropServices.Marshal.ReleaseComObject(rasterEdit);
System.Runtime.InteropServices.Marshal.ReleaseComObject(raster2);
System.Runtime.InteropServices.Marshal.ReleaseComObject(rasterDataSet);
System.Runtime.InteropServices.Marshal.ReleaseComObject(rasterWorkspace2);
System.Runtime.InteropServices.Marshal.ReleaseComObject(workspaceFac);
if (File.Exists(parth))
{
File.Delete(parth);
}
workspaceFac = new RasterWorkspaceFactoryClass();
IDataset outdataset = pSaveAs.SaveAs(name, workspaceFac.OpenFromFile(directory, 0), "IMAGINE Image");
System.Runtime.InteropServices.Marshal.ReleaseComObject(outdataset);
return;
}
/// <summary>
/// 栅格操作修改栅格的值
/// </summary>
/// <param name="pRasterDataset2"></param>
public static void ChangeRasterValue(IRasterDataset2 pRasterDataset2)
{
//设置读取栅格的大小
IRaster2 pRaster2 = pRasterDataset2.CreateFullRaster() as IRaster2;
IPnt pPntBlock = new PntClass();
pPntBlock.X = 128;
pPntBlock.Y = 128;
IRasterCursor pRasterCursor = pRaster2.CreateCursorEx(pPntBlock);
IRasterEdit pRasterEdit = pRaster2 as IRasterEdit;
if (pRasterEdit.CanEdit())
{
//循环波段,长和宽度
IRasterBandCollection pBands = pRasterDataset2 as IRasterBandCollection;
IPixelBlock3 pPixelblock3 = null;
int pBlockwidth = 0;
int pBlockheight = 0;
System.Array pixels;
object pValue;
long pBandCount = pBands.Count;
//
IRasterProps pRasterProps = pRaster2 as IRasterProps;
object nodata = pRasterProps.NoDataValue;
do
{
pPixelblock3 = pRasterCursor.PixelBlock as IPixelBlock3;
pBlockwidth = pPixelblock3.Width;
pBlockheight = pPixelblock3.Height;
for (int k = 0; k < pBandCount; k++)
{
pixels = (System.Array)pPixelblock3.get_PixelData(k);
for (int i = 0; i < pBlockwidth; i++)
{
for (int j = 0; j < pBlockheight; j++)
{
pValue = pixels.GetValue(i, j);
int value = Convert.ToInt32(pValue);
if (Convert.ToInt32(pValue) != 3)
{
pixels.SetValue(Convert.ToByte(0), i, j);
}
}
}
pPixelblock3.set_PixelData(k, pixels);
}
pPntBlock = pRasterCursor.TopLeft;
pRasterEdit.Write(pPntBlock, (IPixelBlock)pPixelblock3);
} while (pRasterCursor.Next());
System.Runtime.InteropServices.Marshal.ReleaseComObject(pRasterEdit);
}
}
public static IRasterDataset exportRasterData(string parth, IRasterLayer rasterLayer, float[,] rasterMat)
{
string directory = parth.Substring(0, parth.LastIndexOf("\\"));
string name = parth.Substring(parth.LastIndexOf("\\") + 1);
IWorkspaceFactory workspaceFac = new RasterWorkspaceFactoryClass();
IRasterWorkspace2 rasterWorkspace2 = workspaceFac.OpenFromFile(directory, 0) as IRasterWorkspace2;
IRasterInfo rasterInfo = (rasterLayer.Raster as IRawBlocks).RasterInfo;
IPoint originPoint = new Point();
originPoint.PutCoords(rasterInfo.Origin.X, rasterInfo.Origin.Y - (rasterLayer.Raster as IRasterProps).Height * (rasterLayer.Raster as IRasterProps).MeanCellSize().Y);
IRasterProps rasterProps = rasterLayer.Raster as IRasterProps;
IRasterDataset rasterDataSet = rasterWorkspace2.CreateRasterDataset(name, "IMAGINE Image", originPoint, rasterProps.Width, rasterProps.Height, rasterProps.MeanCellSize().X, rasterProps.MeanCellSize().Y, 1, rstPixelType.PT_FLOAT, rasterProps.SpatialReference, true);
IRaster2 raster2 = rasterDataSet.CreateDefaultRaster() as IRaster2;
IPnt pntClass = new Pnt();
pntClass.X = rasterProps.Width;
pntClass.Y = rasterProps.Height;
IRasterCursor rasterCursor = raster2.CreateCursorEx(pntClass);
IRasterEdit rasterEdit = raster2 as IRasterEdit;
if (rasterEdit.CanEdit())
{
IRasterBandCollection bands = rasterDataSet as IRasterBandCollection;
IPixelBlock3 pixelBlock3 = rasterCursor.PixelBlock as IPixelBlock3;
System.Array pixels = (System.Array)pixelBlock3.get_PixelData(0);
for (int i = 0; i < rasterProps.Width; i++)
{
for (int j = 0; j < rasterProps.Height; j++)
{
pixels.SetValue(Convert.ToSingle(rasterMat[j, i]), i, j);
}
}
pixelBlock3.set_PixelData(0, (System.Array)pixels);
rasterEdit.Write(rasterCursor.TopLeft, (IPixelBlock)pixelBlock3);
}
(raster2 as IRasterProps).NoDataValue = 0f;
rasterEdit.Refresh();
System.Runtime.InteropServices.Marshal.ReleaseComObject(rasterEdit);
return(rasterDataSet);
}
public static void ReplacePixel(IRasterDataset2 irasterDataset2_0)
{
IRaster2 raster2 = irasterDataset2_0.CreateFullRaster() as IRaster2;
IPnt pntClass = new Pnt()
{
X = 128,
Y = 128
};
raster2.CreateCursorEx(pntClass);
IRasterEdit rasterEdit = raster2 as IRasterEdit;
if (rasterEdit.CanEdit())
{
long count = (long)(irasterDataset2_0 as IRasterBandCollection).Count;
IRasterProps rasterProp = raster2 as IRasterProps;
object noDataValue = rasterProp.NoDataValue;
rasterProp.NoDataValue = 255;
(rasterProp as ISaveAs).SaveAs("j:\\image1.tif", null, "TIFF");
Marshal.ReleaseComObject(rasterEdit);
}
}
//IRasterStatistics rasterStatic;
private void SetRasterSymbol(IRasterLayer rasterLayer)
{
//获取选择的序号
int index = sBC.SelectedIndex;
ISymbologyStyleClass symbologyStyleClass = axSymbologyControl1.GetStyleClass(esriSymbologyStyleClass.esriStyleClassColorRamps);
IStyleGalleryItem mStyleGalleryItem = symbologyStyleClass.GetItem(index);
//获取选择的符号
IColorRamp select = (IColorRamp)mStyleGalleryItem.Item;
IRasterStretchColorRampRenderer rasterStretchColorRampRenderer = new RasterStretchColorRampRendererClass();
IRasterRenderer rasterRenderer = rasterStretchColorRampRenderer as IRasterRenderer;
rasterRenderer.Raster = (rasterLayer).Raster;
if (checkBox1.Checked == true)
{
//修改像元值 线性拉伸
IRaster2 pRaster2 = rasterLayer.Raster as IRaster2;
IPnt pPntBlock = new PntClass();
pPntBlock.X = 128;
pPntBlock.Y = 128;
IRasterCursor pRasterCursor = pRaster2.CreateCursorEx(pPntBlock);
IRasterEdit pRasterEdit = pRaster2 as IRasterEdit;
if (pRasterEdit.CanEdit())
{
// IRasterBandCollection pBands = rasterLayer as IRasterBandCollection;
IPixelBlock3 pPixelblock3 = null;
int pBlockwidth = 0;
int pBlockheight = 0;
System.Array pixels;
IPnt pPnt = null;
object pValue;
// long pBandCount = pBands.Count;
//获取Nodata
//IRasterProps pRasterPro = pRaster2 as IRasterProps;
//object pNodata = pRasterPro.NoDataValue;
do
{
pPixelblock3 = pRasterCursor.PixelBlock as IPixelBlock3;
pBlockwidth = pPixelblock3.Width;
pBlockheight = pPixelblock3.Height;
// for (int k = 0; k < pBandCount; k++)
//IRasterBandCollection bandCollection;
//IRasterLayer irasterLayer = rasterLayer;
//IRaster2 raster = rasterLayer.Raster as IRaster2;
//IRasterDataset rd = raster.RasterDataset;
//bandCollection = rd as IRasterBandCollection;
//IEnumRasterBand enumband = bandCollection.Bands;
//IRasterBand rasterBand = enumband.Next();
//rasterStatic = null;
//if (rasterBand != null && rasterBand.Statistics != null)
//{
// rasterStatic = rasterBand.Statistics;
//}
int pixelmax, pixelmin;
{
pixels = (System.Array)pPixelblock3.get_PixelData(0);
pixelmax = Convert.ToInt32(pixels.GetValue(0, 0));
pixelmin = pixelmax;
for (int i = 0; i < pBlockwidth; i++)
{
for (int j = 0; j < pBlockheight; j++)
{
pValue = pixels.GetValue(i, j);
{
// pixels.SetValue(Convert.ToByte(Convert.ToInt32(pValue) * strscale), i, j);
if (Convert.ToInt32(pValue) > pixelmax)
{
pixelmax = Convert.ToInt32(pValue);
}
if (Convert.ToInt32(pValue) < pixelmin)
{
pixelmin = Convert.ToInt32(pValue);
}
}
}
}
double strscale = ((double)pixelmax - (double)pixelmin) / 255.0;
for (int i = 0; i < pBlockwidth; i++)
{
for (int j = 0; j < pBlockheight; j++)
{
pValue = pixels.GetValue(i, j);
{
pixels.SetValue(Convert.ToByte((Convert.ToInt32(pValue) - pixelmin) / (strscale)), i, j);
}
}
}
pPixelblock3.set_PixelData(0, pixels);
}
pPnt = pRasterCursor.TopLeft;
pRasterEdit.Write(pPnt, (IPixelBlock)pPixelblock3);
}while (pRasterCursor.Next());
System.Runtime.InteropServices.Marshal.ReleaseComObject(pRasterEdit);
// MessageBox.Show("done");
}
}
rasterRenderer.Update();
rasterStretchColorRampRenderer.ColorRamp = select;
rasterRenderer.Update();
((IRasterLayer)rasterLayer).Renderer = rasterRenderer;
}
public void ChangeRasterValue(IRasterDataset2 pRasterDatset, double dbScale, double dbOffset)
{
try
{
IRaster2 pRaster2 = pRasterDatset.CreateFullRaster() as IRaster2;
IPnt pPntBlock = new PntClass();
pPntBlock.X = 128;
pPntBlock.Y = 128;
IRasterCursor pRasterCursor = pRaster2.CreateCursorEx(pPntBlock);
IRasterEdit pRasterEdit = pRaster2 as IRasterEdit;
if (pRasterEdit.CanEdit())
{
IRasterBandCollection pBands = pRasterDatset as IRasterBandCollection;
IPixelBlock3 pPixelblock3 = null;
int pBlockwidth = 0;
int pBlockheight = 0;
System.Array pixels;
IPnt pPnt = null;
object pValue;
long pBandCount = pBands.Count;
//获取Nodata
IRasterProps pRasterPro = pRaster2 as IRasterProps;
object pNodata = pRasterPro.NoDataValue;
//double dbNoData = Convert.ToDouble(((double[])pNodata)[0]);
double dbNoData = getNoDataValue(pNodata);
do
{
pPixelblock3 = pRasterCursor.PixelBlock as IPixelBlock3;
pBlockwidth = pPixelblock3.Width;
pBlockheight = pPixelblock3.Height;
for (int k = 0; k < pBandCount; k++)
{
pixels = (System.Array)pPixelblock3.get_PixelData(k);
for (int i = 0; i < pBlockwidth; i++)
{
for (int j = 0; j < pBlockheight; j++)
{
pValue = pixels.GetValue(i, j);
double ob = Convert.ToDouble(pValue);
if (ob != dbNoData)
{
ob *= dbScale; //翻转
ob += dbOffset; //Z方向偏移
}
IRasterProps pRP = pRaster2 as IRasterProps;
if (pRP.PixelType == rstPixelType.PT_CHAR)
{
pixels.SetValue(Convert.ToChar(ob), i, j);
}
else if (pRP.PixelType == rstPixelType.PT_UCHAR)
{
pixels.SetValue(Convert.ToByte(ob), i, j);
}
else if (pRP.PixelType == rstPixelType.PT_FLOAT)
{
pixels.SetValue(Convert.ToSingle(ob), i, j);
}
else if (pRP.PixelType == rstPixelType.PT_DOUBLE)
{
pixels.SetValue(Convert.ToDouble(ob), i, j);
}
else if (pRP.PixelType == rstPixelType.PT_ULONG)
{
pixels.SetValue(Convert.ToInt32(ob), i, j);
}
else
{
;
}
}
}
pPixelblock3.set_PixelData(k, pixels);
System.Array textPixel = null;
textPixel = (System.Array)pPixelblock3.get_PixelData(k);
}
pPnt = pRasterCursor.TopLeft;
pRasterEdit.Write(pPnt, (IPixelBlock)pPixelblock3);
}while (pRasterCursor.Next());
//改变了Z值，重新统计下直方图
//IRasterDataset2 prd = pRaster2 as IRasterDataset2;
IRasterDatasetEdit3 pRedtit = pRasterDatset as IRasterDatasetEdit3;
pRedtit.DeleteStats();//This method is avaliable only on raster datasets in File and ArcSDE geodatabases.
pRedtit.ComputeStatisticsHistogram(1, 1, null, true);
pRasterEdit.Refresh();
System.Runtime.InteropServices.Marshal.ReleaseComObject(pRasterEdit);
}
}
catch (System.Exception ex)
{
}
}
public bool SetRegionToNoDataValue()
{
try
{
if (m_pSrcRaster == null || m_pClipPolygon == null || double.IsNaN(m_dbNoDataValue))
{
return(false);
}
IGeoDataset pSrcGeoDataset = m_pSrcRaster as IGeoDataset;
IExtractionOp pRasterExtractionOp = new RasterExtractionOpClass();
IRasterProps pSrcRasterProps = m_pSrcRaster as IRasterProps;
double dbCellSize = (pSrcRasterProps.MeanCellSize().X + pSrcRasterProps.MeanCellSize().Y) / 2;
//设置范围和分辨率
IRasterAnalysisEnvironment pRasterAnalysisEnv = pRasterExtractionOp as IRasterAnalysisEnvironment;
pRasterAnalysisEnv.SetCellSize(esriRasterEnvSettingEnum.esriRasterEnvValue, dbCellSize);
pRasterAnalysisEnv.SetExtent(esriRasterEnvSettingEnum.esriRasterEnvValue, m_pClipPolygon.Envelope, Type.Missing);
//pRasterAnalysisEnv.OutSpatialReference = (m_pSrcRaster as IRasterProps).SpatialReference;
//保留区域外的值，区域内的设置为原始栅格的无效值
IGeoDataset pDstGeoDataset = pRasterExtractionOp.Rectangle(pSrcGeoDataset, m_pClipPolygon.Envelope, true);
//逐点判断像素是否在区域内，在区域内则改变为设置值，否则不变
IRelationalOperator pRelationalOp = m_pClipPolygon as IRelationalOperator;
if (pDstGeoDataset is IRaster)
{
//得到原始栅格的对象，用于修改
IRaster2 pSrcRaster2 = m_pSrcRaster as IRaster2;
IRasterDataset2 pSrcRasterDataset2 = pSrcRaster2.RasterDataset as IRasterDataset2;
IRaster pTmpRaster = pSrcRasterDataset2.CreateFullRaster();
IRasterEdit pSrcEdit = pTmpRaster as IRasterEdit;
//得到图层NoDataValue
IRasterProps rasterProps = pSrcRaster2 as IRasterProps;
double noData = ClsGDBDataCommon.getNoDataValue(rasterProps.NoDataValue);
//得到输出的栅格
IRaster2 pDstRaster2 = pDstGeoDataset as IRaster2;
IRasterProps pDstRasterProps = pDstRaster2 as IRasterProps;
IRasterCursor pDstRasterCursor = pDstRaster2.CreateCursorEx(null);
//pDstRasterCursor.Reset();
do
{
//得到当前处理的块
IPixelBlock3 pixelBlock3 = pDstRasterCursor.PixelBlock as IPixelBlock3;
int nWidth = pixelBlock3.Width;
int nHeight = pixelBlock3.Height;
IPnt ptLeftTop = pDstRasterCursor.TopLeft;
//block值转数组时，NoData转换时有时为NoData，有时为栅格中的最小值
System.Array array = pixelBlock3.get_PixelData(0) as System.Array;
//逐点判断: 判断像素是否在区域内，在区域内则改变为设置值，否则不变
for (int i = 0; i < nWidth; i++)
{
for (int j = 0; j < nHeight; j++)
{
double dbX = double.NaN, dbY = double.NaN;
//得到当前像素点的地图坐标
int nCurrentX = Convert.ToInt32(ptLeftTop.X + i);
int nCurrentY = Convert.ToInt32(ptLeftTop.Y + j);
pDstRaster2.PixelToMap(nCurrentX, nCurrentY, out dbX, out dbY);
IPoint ptInMap = new PointClass();
ptInMap.X = dbX;
ptInMap.Y = dbY;
//判断是否在区域内
bool bFlag = pRelationalOp.Contains(ptInMap as IGeometry);
if (bFlag) //在当前区域内
{
object oValidValue = getValidType(pDstRasterProps, m_dbNoDataValue);
array.SetValue(oValidValue, i, j);
}
else
{
double v = Convert.ToDouble(array.GetValue(i, j));
if (v == 0 || v < -3.4e15 || v > 3.4e15)
//if (v == 0 || Math.Abs(v -noData) <1e18)
{
int col, row;
pSrcRaster2.MapToPixel(dbX, dbY, out col, out row);
//表示getpixelvalue为null表示nodata
object obj = pSrcRaster2.GetPixelValue(0, col, row);
if (obj == null)
{
object oValidValue = getValidType(pDstRasterProps, m_dbNoDataValue);
array.SetValue(oValidValue, i, j);
}
else
{
array.SetValue(obj, i, j);
}
}
}
}
}
pixelBlock3.set_PixelData(0, array);
//得到当前区域块在原图中的左上角像素坐标, 直接修改原栅格的数据
int nPixelLeftX = -1, nPixelLeftY = -1;
double dbMapLeftTopX = double.NaN, dbMapLeftTopY = double.NaN;
pDstRaster2.PixelToMap(Convert.ToInt32(ptLeftTop.X), Convert.ToInt32(ptLeftTop.Y), out dbMapLeftTopX, out dbMapLeftTopY); //得到当前块左上角的地理坐标
pSrcRaster2.MapToPixel(dbMapLeftTopX, dbMapLeftTopY, out nPixelLeftX, out nPixelLeftY);
IPnt ptPixelLeftTop = new PntClass();
ptPixelLeftTop.SetCoords(nPixelLeftX, nPixelLeftY);
if (pSrcEdit.CanEdit())
{
pSrcEdit.Write(ptPixelLeftTop, pixelBlock3 as IPixelBlock);
//pSrcEdit.Refresh();
}
else
{
return(false);
}
} while (pDstRasterCursor.Next() == true);
//更新
pSrcEdit.Refresh();
}
else
{
return(false);
}
return(true);
}
catch (System.Exception ex)
{
return(false);
}
}
private void btn_2e_Click(object sender, EventArgs e)
{
ILayer pLayer = new FeatureLayerClass();
IFeatureClass featureClass = GetFeatureClass(@"D:\a_gis工程设计实践课\china\墓穴地shp\grave.shp");
IGeoDataset geo = featureClass as IGeoDataset;
object extend = geo.Extent;
object o = null;
IFeatureClassDescriptor feades = new FeatureClassDescriptorClass();
feades.Create(featureClass, null, "area");
IRasterRadius rasterrad = new RasterRadiusClass();
rasterrad.SetVariable(12, ref o);
object dCell = 0.014800000;//可以根据不同的点图层进行设置
IInterpolationOp interpla = new RasterInterpolationOpClass();
IRasterAnalysisEnvironment rasanaenv = interpla as IRasterAnalysisEnvironment;
rasanaenv.SetCellSize(esriRasterEnvSettingEnum.esriRasterEnvValue, ref dCell);
rasanaenv.SetExtent(esriRasterEnvSettingEnum.esriRasterEnvValue, ref extend, ref o);
IGeoDataset g_GeoDS_Raster = interpla.IDW((IGeoDataset)feades, 2, rasterrad, ref o);
IRaster pOutRsater = (IRaster)g_GeoDS_Raster;
IRasterLayer pOutRasterlayer = new RasterLayerClass();
pOutRasterlayer.CreateFromRaster(pOutRsater);
pOutRasterlayer.Name = "两个因素都考虑";
//IRaster raster = pOutRasterlayer.Raster;
IRaster2 raster2 = (IRaster2)pOutRsater;
// 指定像素块大小
IPnt pntBlock = new PntClass();
pntBlock.X = 1280;
pntBlock.Y = 1280;
//创建一个光标以给定像素块大小
//定义RasterCursor初始化，参数设为null，内部自动设置PixelBlock大小
//IRasterCursor pRasterCursor = pRaster2.CreateCursorEx(null);
IRasterCursor rasterCursor = raster2.CreateCursorEx(null);
//控制像素块级别的编辑操作
IRasterEdit rasterEdit = raster2 as IRasterEdit;
if (rasterEdit.CanEdit())
{
//得到一段光栅带
IRasterBandCollection bandCollection = (IRasterBandCollection)pOutRsater;
System.Array pixels;
IPnt pnt = null;
object value;
int bandCount = bandCollection.Count;
//创建像素块
IPixelBlock3 pixelBlock3 = null;
int blockWidth = 0;
int blockHeight = 0;
double temp = 0;
do
{
pixelBlock3 = rasterCursor.PixelBlock as IPixelBlock3;
blockWidth = pixelBlock3.Width;
blockHeight = pixelBlock3.Height;
for (int k = 0; k < bandCount; k++)
{
//指定平面的像素的数组
pixels = (System.Array)pixelBlock3.get_PixelData(k);
for (int i = 0; i < blockWidth; i++)
{
for (int j = 0; j < blockHeight; j++)
{
//value = pixels.GetValue(i, j);
////if (Convert.ToInt32(value) == 0)
//{
//设置像素的颜色值
temp = PixelValue1[i, j] + PixelValue2[i, j];
pixels.SetValue((int)temp, i, j);
//}
}
}
pixelBlock3.set_PixelData(k, pixels);
}
pnt = rasterCursor.TopLeft;
rasterEdit.Write(pnt, (IPixelBlock)pixelBlock3);
}while (rasterCursor.Next());
System.Runtime.InteropServices.Marshal.ReleaseComObject(rasterEdit);
//渲染
IRasterClassifyColorRampRenderer pRClassRend = new RasterClassifyColorRampRendererClass();
IRasterRenderer pRRend = pRClassRend as IRasterRenderer;
IRaster pRaster = pOutRasterlayer.Raster;
IRasterBandCollection pRBandCol = pRaster as IRasterBandCollection;
IRasterBand pRBand = pRBandCol.Item(0);
if (pRBand.Histogram == null)
{
pRBand.ComputeStatsAndHist();
}
pRRend.Raster = pRaster;
pRClassRend.ClassCount = 10;
pRRend.Update();
IRgbColor pFromColor = new RgbColorClass();
pFromColor.Red = 135;//天蓝色
pFromColor.Green = 206;
pFromColor.Blue = 235;
IRgbColor pToColor = new RgbColorClass();
pToColor.Red = 124;//草坪绿
pToColor.Green = 252;
pToColor.Blue = 0;
IAlgorithmicColorRamp colorRamp = new AlgorithmicColorRampClass();
colorRamp.Size = 10;
colorRamp.FromColor = pFromColor;
colorRamp.ToColor = pToColor;
bool createColorRamp;
colorRamp.CreateRamp(out createColorRamp);
IFillSymbol fillSymbol = new SimpleFillSymbolClass();
for (int i = 0; i < pRClassRend.ClassCount; i++)
{
fillSymbol.Color = colorRamp.get_Color(i);
pRClassRend.set_Symbol(i, fillSymbol as ISymbol);
pRClassRend.set_Label(i, pRClassRend.get_Break(i).ToString("0.00"));
}
pOutRasterlayer.Renderer = pRRend;
this.axMapControl1.AddLayer(pOutRasterlayer);
}
}