获取点坐标和高程(C# +ArcEngine93)

获取点坐标和高程(C# +ArcEngine93)

添加时间:  2010-12-26   来源:外唐教程网   点击：加载中

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摘要：获取点坐标和高程(C# +ArcEngine93),程序说明:1.需要一个带坐标系的栅格数据.2.关键程序很简单,用关键接口ISurface,方法用ISurface.GetElevation().

获取点坐标和高程(C# +ArcEngine93)

程序说明:
1.需要一个带坐标系的栅格数据.
2.关键程序很简单,用关键接口ISurface,方法用ISurface.GetElevation(). 

程序下载

关键代码如下:

• ///
• /// 获取x,y,高程值
• ///
• /// 
• /// 
• /// 
• /// 
• /// 
• void getXYAndHeight(IRaster raster, IPoint point, out double ptX, out double ptY, out double ptHeight)
• {
• ptX = 0.0;
• ptY = 0.0;
• ptHeight = 0.0;
• try
• {
• IGeoDataset geoDt = raster as IGeoDataset;
• ISpatialReference spatialreference = geoDt.SpatialReference;
• IRasterSurface rasterSurface = new RasterSurfaceClass();
• rasterSurface.PutRaster(raster, 0);
• ISurface surface = rasterSurface as ISurface;
• if (point.SpatialReference == null)
• {
• point.Project(spatialreference);
• ptX = point.X;
• ptY = point.Y;
• //获取高程
• ptHeight = surface.GetElevation(point);
• }
• else
• {
• ptX = point.X;
• ptY = point.Y;
• //获取高程
• point.Project(spatialreference);
• ptHeight = surface.GetElevation(point);
• }
• }
• catch (Exception ex)
• {
• MessageBox.Show(ex.Message);
• }
• }

复制代码 <imgid=aimg_77767 alt="1.jpg" src="http://bbs.esrichina-bj.cn/ESRI/attachments/forumid_26/0902241641397d15f06ec630d0.jpg" width="397" status="2" file="attachments/forumid_26/0902241641397d15f06ec630d0.jpg" h="565" w="397" y="1637" x="415" outfunc="null" unselectable="true" initialized="true">
<imgid=aimg_77768 alt="2.jpg" src="http://bbs.esrichina-bj.cn/ESRI/attachments/forumid_26/0902241641a574220287ebfa42.jpg" width="600" status="2" file="attachments/forumid_26/0902241641a574220287ebfa42.jpg" h="344" w="600" y="2206" x="415" outfunc="null" unselectable="true" initialized="true">
希望能给初学者一点帮助.
程序做得不是很完善,欢迎各位修改,提意见.