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 = Type.Missing;
pRasterAnaEnvir.SetExtent(esriRasterEnvSettingEnum.esriRasterEnvValue, ref extentProvider, ref snapRasterData);
IGeoDataset pOutputDataset = pExtractionOp.Polygon(pInputDataset, clipGeo as IPolygon, true);
IRaster clipRaster; //裁切后得到的IRaster
if (pOutputDataset is IRasterLayer)
{
IRasterLayer rasterLayer = pOutputDataset as IRasterLayer;
clipRaster = rasterLayer.Raster;
}
else if (pOutputDataset is IRasterDataset)
{
IRasterDataset rasterDataset = pOutputDataset as IRasterDataset;
clipRaster = rasterDataset.CreateDefaultRaster();
}
else if (pOutputDataset is IRaster)
{
clipRaster = pOutputDataset as IRaster;
}
else
{
return;
}
//保存裁切后得到的clipRaster
//如果直接保存为img影像文件
IWorkspaceFactory pWKSF = new RasterWorkspaceFactoryClass();
IWorkspace pWorkspace = pWKSF.OpenFromFile(@"C: emp", 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: emp est.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: emp est.mdb", 0);
IRasterWorkspaceEx pRasterWKS = pWorkspace as IRasterWorkspaceEx;
IRasterStorageDef pRasterStorageDef = new RasterStorageDefClass();
pRasterStorageDef.CompressionType = esriRasterCompressionType.esriRasterCom
pressionJPEG2000;
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