Geoprocessor 裁切

最新推荐文章于 2024-06-27 16:50:44 发布

转载最新推荐文章于 2024-06-27 16:50:44 发布 · 1k 阅读

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本文介绍如何利用ArcGIS环境中的Geoprocessor类和Clip工具实现地理空间数据裁剪，具体步骤包括创建裁剪工作空间、加载源特征类、选择裁剪要素类、设置输出文件路径，并通过尝试捕获执行过程中的错误信息。

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private void Clipbyprovince()
        {
            Geoprocessor gp1 = new Geoprocessor();
            gp1.OverwriteOutput = true;

            ESRI.ArcGIS.AnalysisTools.Clip Clip = new ESRI.ArcGIS.AnalysisTools.Clip();
            IWorkspaceFactory Aiwsf = new ShapefileWorkspaceFactoryClass();

            IFeatureWorkspace inFWS = Aiwsf.OpenFromFile(Environment.CurrentDirectory + "/shp/", 0) as IFeatureWorkspace;
            IFeatureClass inFeatureClass = inFWS.OpenFeatureClass("SO2");

            IFeatureWorkspace clipFWS = Aiwsf.OpenFromFile(Environment.CurrentDirectory + "/province/", 0) as IFeatureWorkspace;
            IFeatureClass clipFeatureClass = clipFWS.OpenFeatureClass("hb");

            if (File.Exists(Environment.CurrentDirectory + "/cut/SO2.shp"))
            {
                IFeatureWorkspace outFWS = Aiwsf.OpenFromFile(Environment.CurrentDirectory + "/cut/", 0) as IFeatureWorkspace;
                IFeatureClass pFeatureClass = outFWS.OpenFeatureClass("SO2");
                IDataset pDataset = pFeatureClass as IDataset;
                pDataset.Delete();
            }

            Clip.in_features = inFeatureClass;

            Clip.clip_features = clipFeatureClass; //必须与inFeatureClass类型一直 否则报错     对COM组件的调用返回了错误HRESULT E_FAIL
            Clip.out_feature_class = Environment.CurrentDirectory + "/cut/SO2.shp";

            try
            {
                IGeoProcessorResult result = (IGeoProcessorResult)gp1.Execute(Clip, null);
            }
            catch (Exception ex)
            {
                Class_Log.WriteLog("切割" + ex.Message);
            }
            finally
            {

                //MapHelper.ReleaseObject(gp1);
                //MapHelper.ReleaseObject(Clip);
            }
        }