编辑时snapping的添加

最新推荐文章于 2020-10-30 18:04:09 发布

转载最新推荐文章于 2020-10-30 18:04:09 发布 · 117 阅读

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原文链接：https://yq.aliyun.com/articles/395148

本文介绍如何在ArcGIS中实现snapping编辑功能，包括启动编辑会话、设置目标图层及添加捕捉代理等步骤。通过这些操作，可以确保在绘制地理要素时能够精确地捕捉到现有要素的顶点和边界。

原文编辑时snapping的添加

注意需要在编辑模式下进行snapping的添加（也即先需要使用IEngineEditor进入编辑状态）：

IMapControl3 mMap = (IMapControl3)((IToolbarControl)toolHook).Buddy;
IEngineEditor m_engineEditor = new EngineEditorClass();
if (m_engineEditor.EditState == esriEngineEditState.esriEngineStateNotEditing)
{
//Start editing the workspace of the first feature layer found.        
ILayer currentLayer = mMap.get_Layer(0);
if (currentLayer is IFeatureLayer)
{
    IFeatureLayer featureLayer = currentLayer as IFeatureLayer;
    IDataset dataset = featureLayer.FeatureClass as IDataset;
    IWorkspace workspace = dataset.Workspace;
    m_engineEditor.StartEditing(workspace, mMap.Map);
    ((IEngineEditLayers)m_engineEditor).SetTargetLayer(featureLayer, 0);
}
//snapping
if (mMap.LayerCount != 0)
{
    IEngineEditor editor = new EngineEditorClass();
    IEngineEditLayers editLayers = editor as IEngineEditLayers;
    IEngineSnapEnvironment snapEnvironment = editor as IEngineSnapEnvironment;

    IEngineFeatureSnapAgent featureSnapAgent = new EngineFeatureSnap();
    featureSnapAgent.FeatureClass = ((IFeatureLayer)mMap.get_Layer(0)).FeatureClass; ;
    featureSnapAgent.HitType = esriGeometryHitPartType.esriGeometryPartVertex | esriGeometryHitPartType.esriGeometryPartBoundary | esriGeometryHitPartType.esriGeometryPartEndpoint;
    snapEnvironment.AddSnapAgent(featureSnapAgent);    
}