ArcMap中输出tif图片时的Write GeoTIFF Tags选项，Engine中如何实现？

【解决办法】：
需要设置IExportTIFF.GeoTiff 为true; 并且设置IWorldFileSettings.MapExtent，可以参考下面代码： 
调用代码： 
NewExport(axMapControl1.ActiveView, @D:\zxy.tif, 120); 
函数为：

private bool NewExport(IActiveView activeView, string pathFileName, int pOutDPI) 

{ 

if (activeView == null || !(pathFileName.EndsWith(.tif))) 

{ 

return false; 

} 

IExport pExport = new ExportTIFFClass(); //创建输出对象 

pExport.ExportFileName = pathFileName; //定义输出图片位置



int screenResolution = 96; //屏幕分辨率 

int outputResulotion = pOutDPI; 

pExport.Resolution = outputResulotion; //定义输出图片分辨率 



tagRECT exportRECT; 

exportRECT.left = 0; 

exportRECT.top = 0; 

exportRECT.right = activeView.ExportFrame.right * (outputResulotion / screenResolution); 

exportRECT.bottom = activeView.ExportFrame.bottom * (outputResulotion / screenResolution); //获取当前要输出的区域 



// Set up the PixelBounds envelope to match the exportRECT 

IEnvelope pExportEnv = new EnvelopeClass(); 

pExportEnv.PutCoords(exportRECT.left, exportRECT.top, exportRECT.right, exportRECT.bottom); 

pExport.PixelBounds = pExportEnv; //设置输出图片大小 



IExportTIFF exportTiff = pExport as IExportTIFF; 

exportTiff.GeoTiff = true; 

exportTiff.CompressionType = esriTIFFCompression.esriTIFFCompressionLZW; 



IWorldFileSettings worldFileSet = pExport as IWorldFileSettings; 

worldFileSet.MapExtent = activeView.Extent; 



int hDC = pExport.StartExporting(); 



activeView.Output(hDC, Convert.ToInt32(outputResulotion), ref exportRECT, null, null); //输出图片 

pExport.FinishExporting(); //结束输出 

pExport.Cleanup(); //清理临时文件、释放内存 

return true; 



}