ArcGIS Engine将栅格创建为图层并将背景设置为白色

代码

public static ILayer RasterToLayer(string sFullName)
{
	ILayer pLayer = null;
	try
	{
		var sFolder = Path.GetDirectoryName(sFullName);
		var sName = Path.GetFileName(sFullName);
		var pRasterWorkspace = new RasterWorkspaceFactory().OpenFromFile(sFolder, 0) as IRasterWorkspace;
		var pRasterDataset = pRasterWorkspace.OpenRasterDataset(sName);
		if ((pRasterDataset is IRasterPyramid3 pRasterPyramid) && (!pRasterPyramid.Present))
		{
			pRasterPyramid.Create(); //自动创建金字塔（耗时较长）
		}
		var pRaster = pRasterDataset.CreateDefaultRaster();
		((IRasterProps)(pRaster as IRasterBandCollection).Item(0)).NoDataValue = 0; //设置黑色无影像部分为白色背景
		var pRasterLayer = new RasterLayer();
		pRasterLayer.CreateFromRaster(pRaster);
		pLayer = pRasterLayer as ILayer; //转换为ILayer
	}
	catch (Exception ex)
	{
		Console.WriteLine(ex.Message);
	}
	return pLayer;
}

补充

创建金字塔可以加快数据加载速度。如未创建，本功能将在首次调用时自动创建，但速度较慢。可考虑将其封装成脚本调用。