学步园

得到Raster的一些基本信息（高程值，列数，列数）

IRasterLayer pRasterLayer = (IRasterLayer)pSC1.Scene.get_Layer(0);

IRaster pRaster = pRasterLayer.Raster;

int pRowCount = pRasterLayer.RowCount;

                       

IRasterBandCollection pRasterbandCollection = (IRasterBandCollection)pRaster;

IRasterBand pRasterBand = pRasterbandCollection.Item(0);

 

IRawPixels pRawPixels = (IRawPixels)pRasterBand;

IRasterProps pRProps = (IRasterProps)pRawPixels;

IRasterAnalysisProps pRasterAP = (IRasterAnalysisProps)pRaster;

//获得DEM左上角的坐标

IGeoDataset pGeoDataset = (IGeoDataset)pRaster;

IEnvelope2 pEnv2 = new EnvelopeClass();

pEnv2 = (IEnvelope2)pGeoDataset.Extent;

IPoint pPoint = pEnv2.UpperLeft;

                       

//用经纬度表示的DEM源点X坐标

double pOriginX = pPoint.X;                          //DEM源点X坐标（左上角点）  

double pOriginY = pPoint.Y;                          //DEM源点Y坐标

//MessageBox.Show(Convert.ToString(pOriginX)+"   "+Convert .ToString (pOriginY ));

 

IRasterStatistics pRasterStatics = pRasterBand.Statistics;

double m_MaxHeight = pRasterStatics.Maximum;        //DEM最大的高程值

double  pBlockX = (double)pRProps.MeanCellSize().X; //网格的X间距

double  pBlockY = (double)pRProps.MeanCellSize().Y; //网格的Y间距

double  pBlockArea = pBlockX * pBlockY;             //网格的面积

 

int pColumns = pRProps.Width;                       //DEM列数

int pRows = pRProps.Height;                         //DEM行数

IPnt pBlockSize = new DblPntClass();

pBlockSize.X = pColumns;

pBlockSize.Y = pRows;

IPixelBlock3 pPixelBlock = (IPixelBlock3)pRawPixels.CreatePixelBlock(pBlockSize);

IPnt pBlockOrigin = new DblPntClass();

pBlockOrigin.X = 0;

pBlockOrigin.Y = 0;

pRawPixels.Read(pBlockOrigin, (IPixelBlock)pPixelBlock);

double pHeight = pPixelBlock.Width;

//存储格网DEM的二维数组

System.Array pPixelData = (System.Array)pPixelBlock.get_PixelDataByRef(0);

用pPixelData.GetValue(j, k)来获得每一个栅格的高程值