叠置分析
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三、实现代码
1) 、叠置求交代码
///
/// 矢量图层叠置分析的叠置求交
///
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public IFeatureLayer CreateOverlayAnayiss_Intersect(IFeatureLayer pInputFLayer, IFeatureLayer pOverlayFLayer, string strWorkspaceFactoryProgID,string strPathName, bool useSelectedInput, bool useSelectedOverlay, double dTolerance)
{
if (pInputFLayer == null)
return;
if (pOverlayFLayer == null)
return;
if (dTolerance < 0)
return;
if (string.IsNullOrEmpty(strWorkspaceFactoryProgID) == true) return;
if (string.IsNullOrEmpty(strPathName) == true)
return;
ITable pInputTable = GetFeatureLayerTable(pInputFLayer,false);
if (pInputTable == null)
return;
ITable pOverlayTable = GetFeatureLayerTable(pOverlayFLayer,false); if (pOverlayTable == null)
return;
//创建输出要素类的名称,指定输出位置
IFeatureClassName pFCName = new FeatureClassNameClass(); IWorkspaceName pWSName = new WorkspaceNameClass(); pWSName.WorkspaceFactoryProgID = strWorkspaceFactoryProgID; pWSName.PathName = strPathName;
IDatasetName pDatasetName = (IDatasetName)pFCName; = "Intersect_result";
pDatasetName.WorkspaceName = pWSName;
//执行叠置求交
IBasicGeoprocessor pBGP = new BasicGeoprocessorClass(); IFeatureClass pOutFClass = null;
try
pOutFClass = pBGP.Intersect(pInputTable, useSelectedInput, pOverlayTable, useSelectedOverlay, dTolerance, pFCName);
}
catch (Exception ex)
{
MessageBox.Show("叠置求交失败");
return null;
}
if (pOutFClass == null)
return null;
//返回叠置求交结果
IFeatureLayer pOutputFLayer = new FeatureLayerClass();
pOutputFLayer.FeatureClass = pOutFClass;
string strFCAliasName = pOutFClass.AliasName;
= strFCAliasName;
return pOutputFLayer;
}
2) 、叠置求和代码
///
/// 矢量图层叠置分析的叠置求和,叠置求和的两个图层必须是面图层
///
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Public IFeatureLayer CreateOverlayAnayiss_Union(IFeatureLayer pInputFLayer,IFeatureLayer pOverlayFLayer,string strWorkspaceFactoryProgID,string strPathName, bool useSelectedInput, bool useSelectedOverlay, double dTolerance)
{
if(pInputFLayer==null)
return;
if(pOverlayFLayer==null)
return;
if(string.IsNullOrEmpty(strWorkspaceFactoryProgID)==true)
return;
if (string.IsNullOrEmpty(strPathName) == true)
return;
ITable pInputTable = GetFeatureLayerTable(pInputFLayer,true);
if (pInputTable == null)
return;
ITable pOverlayTable = GetFeatureLayerTable(pOverlayFLayer,true);