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影像数据的裁切和保存
ArcGIS 的栅格影像可以供保存的格式有：
The format strings used for the supported formats are below, and they are case sensitive:
| Format Name | String Used |
|---|---|
| Imagine | "IMAGINE Image" |
| TIFF | "TIFF" |
| GRID | "GRID" |
| JPEG | "JPG" |
| JP2000 | "JP2" |
| BMP | "BMP" |
| PNG | "PNG" |
| GIF | "GIF" |
| PCI Raster | "PIX" |
| X11 Pixmap | "XPM" |
| PCRaster | "MAP" |
| Memory Raster | "MEM" |
| HDF4 | "HDF4" |
| BIL | "BIL" |
| BIP | "BIP" |
| BSQ | "BSQ" |
| Idrisi Raster Format | "RST" |
| ENVI Raster Format | "ENVI" |
| Geodatabase Raster | "GDB" |
保存栅格影像的方法
public void SaveAs(IRasterDataset rasterDataset, IWorkspace workspace, string sFormat, string sName)
{ //Using ISaveAs2, you can specify the storage property for the output raster, such as tile size, compression,
//and pyramid building, etc. for geodatabase raster, some also applies to output as a file format.
ISaveAs saveAs = rasterDataset as ISaveAs;
saveAs.SaveAs(sName, workspace, sFormat);
}
public void SaveAsWithCompressionAndTile(IRasterDataset rasterDataset)
{ //rasterDataset can be created from any data source, file system, or geodatabase. //It could also be a raster object (IRaster).
ISaveAs2 saveAs2 = (ISaveAs2)rasterDataset; //Set storage.
IRasterStorageDef rasterStorageDef = new RasterStorageDefClass();
IRasterStorageDef2 rasterStorageDef2 = (IRasterStorageDef2)rasterStorageDef;
rasterStorageDef2.CompressionType = esriRasterCompressionType.esriRasterCompressionJPEG2000;
rasterStorageDef2.CompressionQuality = 50;
rasterStorageDef2.Tiled = true;
rasterStorageDef2.TileHeight = 128;
rasterStorageDef2.TileWidth = 128;
//Set output workspace.
IRasterWorkspaceEx rasterWorkspaceEx = OpenFileGDBWorkspace("c:\\temp\\fgdb.gdb") ; IWorkspace workspace = (IWorkspace)rasterWorkspaceEx;
saveAs2.SaveAsRasterDataset("filegdbRaster", workspace, "gdb", rasterStorageDef2) ; }
public IRasterWorkspaceEx OpenFileGDBWorkspace(string sPath)
{ IWorkspaceFactory workspaceFactory = new FileGDBWorkspaceFactoryClass();
IWorkspace workspace = workspaceFactory.OpenFromFile(sPath, 0);
IRasterWorkspaceEx rasterWorkspaceEx = (IRasterWorkspaceEx)workspace;
return rasterWorkspaceEx;
}
Turning off pyramid building
You can also turn off pyramid building for outputs, such as IMG, GRID, and TIFF formats using the ISaveAs2
interface. See the following code example:
public void SaveAsWithoutBuildingPyramids(IRaster raster)
{ ISaveAs2 saveAs2 = (ISaveAs2)raster;
IRasterStorageDef rasterStorageDef = new RasterStorageDefClass();
IRasterStorageDef2 rasterStorageDef2 = (IRasterStorageDef2)rasterStorageDef;
rasterStorageDef2.PyramidLevel = 0;
IRasterWorkspace rasterWorkspace = SetRasterWorkspace("c:\\temp"); IWorkspace workspace = (IWorkspace)rasterWorkspace;
saveAs2.SaveAsRasterDataset("image1.img", workspace, "IMAGINE Image", rasterStorageDef2); }
public IRasterWorkspace SetRasterWorkspace(string sPath)
{ IWorkspaceFactory workspaceFactory = new RasterWorkspaceFactoryClass();
IWorkspace workspace = workspaceFactory.OpenFromFile(sPath, 0);
IRasterWorkspace rasterWorkspace = (IRasterWorkspace)workspace;
return rasterWorkspace;
}
影像裁剪和保存 示例2
//影像裁切IGeometry clipGeo = axMapControl1.TrackPolygon(); //ILayer layer = axMapControl1.get_Layer(i); //要裁切的影像图层IRasterLayer pRasterLayer = layer as IRasterLayer;IRaster pRaster = pRasterLayer.Raster;IRasterProps pProps = pRaster as IRasterProps;object cellSizeProvider = pProps.MeanCellSize().X;IGeoDataset pInputDataset = pRaster as IGeoDataset;IExtractionOp pExtractionOp = new RasterExtractionOpClass();IRasterAnalysisEnvironment pRasterAnaEnvir = pExtractionOp as IRasterAnalysisEnvironment;pRasterAnaEnvir.SetCellSize(esriRasterEnvSettingEnum.esriRasterEnvValue, ref cellSizeProvider);object extentProvider = clipGeo.Envelope;object snapRasterData = http://www.mamicode.com/Type.Missing;"C:\temp", 0);ISaveAs pSaveAs = clipRaster as ISaveAs;pSaveAs.SaveAs("test.img", pWorkspace, "IMAGINE Image"); //如果保存在mdb中IRasterStorageDef pRasterStorageDef = new RasterStorageDefClass();pRasterStorageDef.CompressionType = esriRasterCompressionType.esriRasterCompressionJPEG2000;pRasterStorageDef.CompressionQuality = 50;pRasterStorageDef.TileHeight = 128;pRasterStorageDef.TileWidth = 128;IWorkspaceFactory pWKSF = new AccessWorkspaceFactoryClass();IWorkspace pWorkspace = pWKSF.OpenFromFile(@"C:\temp\test.mdb", 0);ISaveAs2 pSaveAs = clipRaster as ISaveAs2;pSaveAs.SaveAsRasterDataset("test", pWorkspace, "gdb", pRasterStorageDef); //也可以使用IRasterWorkspaceEx的SaveAsRasterDataset方法保存到mdb中IWorkspaceFactory pWKSF = new AccessWorkspaceFactoryClass();IWorkspace pWorkspace = pWKSF.OpenFromFile(@"C:\temp\test.mdb", 0);IRasterWorkspaceEx pRasterWKS = pWorkspace as IRasterWorkspaceEx;IRasterStorageDef pRasterStorageDef = new RasterStorageDefClass();pRasterStorageDef.CompressionType = esriRasterCompressionType.esriRasterCompressionJPEG2000;pRasterStorageDef.CompressionQuality = 50;pRasterStorageDef.PyramidLevel = 2;pRasterStorageDef.PyramidResampleType = rstResamplingTypes.RSP_BilinearInterpolation;pRasterStorageDef.TileHeight = 128;pRasterStorageDef.TileWidth = 128;IRasterDef pRasterDef = new RasterDefClass();pRasterDef.Description = "rasterdataset";pRasterDef.SpatialReference = axMapControl1.SpatialReference;IGeometryDef pGeoDef = new GeometryDefClass();IGeometryDefEdit pGeoDefEdit = pGeoDef as IGeometryDefEdit;pGeoDefEdit.GeometryType_2 = esriGeometryType.esriGeometryPolygon;pGeoDefEdit.AvgNumPoints_2 = 4;pGeoDefEdit.GridCount_2 = 1;pGeoDefEdit.set_GridSize(0, 1000);pGeoDefEdit.SpatialReference_2 = axMapControl1.SpatialReference;IRasterDataset pRasterDataset = pRasterWKS.SaveAsRasterDataset("test", clipRaster, pRasterStorageDef, "", pRasterDef,pGeoDef);//其实参数可以不用设置，直接：IRasterDataset pRasterDataset = pRasterWKS.SaveAsRasterDataset("test", clipRaster, null, "", null, null);
参考文章
影像数据的裁切和保存
保存栅格数据 ISaveAs.SaveAs Method
影像数据的裁切和保存
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