ESRI.ArcGIS.Display.IScreenDisplay screenDisplay = activeView.ScreenDisplay; // Constant. screenDisplay.StartDrawing(screenDisplay.hDC, (System.Int16) ESRI.ArcGIS.Display.esriScreenCache.esriNoScreenCache); // Explicit cast. ESRI.ArcGIS.Display.IRgbColor rgbColor = new ESRI.ArcGIS.Display.RgbColorClass(); rgbColor.Red = 255; ESRI.ArcGIS.Display.IColor color = rgbColor; // Implicit cast. ESRI.ArcGIS.Display.ISimpleFillSymbol simpleFillSymbol = new ESRI.ArcGIS.Display.SimpleFillSymbolClass(); simpleFillSymbol.Color = color; ESRI.ArcGIS.Display.ISymbol symbol = simpleFillSymbol as ESRI.ArcGIS.Display.ISymbol; // Dynamic cast. ESRI.ArcGIS.Display.IRubberBand rubberBand = new ESRI.ArcGIS.Display.RubberEnvelopeClass(); ESRI.ArcGIS.Geometry.IGeometry geometry = rubberBand.TrackNew(screenDisplay, symbol); screenDisplay.SetSymbol(symbol); screenDisplay.DrawRectangle(geometry as ESRI.ArcGIS.Geometry.IEnvelope); // Dynamic cast. screenDisplay.FinishDrawing();
裁切代码如下,其中envelope是RubberBand工具产生的IGeometry
String tempDirName = @"E:\tmp\ttt\bar"; String tempFileName = Guid.NewGuid().ToString() + ".tif"; String tempFullName = tempDirName + @"\" + tempFileName; ILayer pLayer = axMapControl1.get_Layer(0); IRasterLayer rasterLayer = (IRasterLayer)pLayer; IRaster pRaster = rasterLayer.Raster; //Initialize the Clip tool class. Clip clip = new Clip(); //Set the parameters. clip.in_raster = pRaster; clip.out_raster = tempFullName; //The clipping envelope. //Comment this line out if clipping with a given dataset. clip.rectangle = String.Format("{0} {1} {2} {3}", envelope.XMin, envelope.YMin, envelope.XMax, envelope.YMax); //Initialize the geoprocessor and execute the Clip tool. Geoprocessor geoprocessor = new Geoprocessor(); object outRaster = geoprocessor.Execute(clip, null);
一开始尝试使用RasterLayerExport导出特定区域的栅格,结果发现原来float型的值成了int
api上信誓旦旦说
引用
The RasterLayer property is used to set the input RasterLayer to the RasterLayerExport object; this is a required property. Normally, a raster layer is associated with a raster renderer by default. You can change the raster renderer to what you need. If you don't want to use the raster renderer to filter the pixel values during the export, remove the raster renderer from the raster layer before passing it to the RasterLayerExport object
呵呵,怎么remove the raster renderer啊,也不说清楚...差评