ArcGIS Engine将栅格创建为图层并将背景设置为白色

最新推荐文章于 2024-02-20 18:30:26 发布

原创最新推荐文章于 2024-02-20 18:30:26 发布 · 2.2k 阅读

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CC 4.0 BY-SA版权

文章标签：

#RasterWorkspaceFactory #RasterDataset #IRasterPyramid #Raster #IRasterProps

本文介绍了一种使用ArcGIS进行影像图层加载的方法，通过创建金字塔来提高数据加载速度。代码示例展示了如何从指定路径加载影像文件，创建金字塔，并设置无影像区域的显示方式。

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;
}