比如，将某一shp文件中面积大于某值的图斑查找出，然后另存为一个新的shp文件
procedure ConvertFeatureClassToShapesFile(pFeatureClass: IFeatureClass; pFilePath, pFileName: string);
var
  pInDataSet, pOutDataSet: IDataSet;
  pInWorkSpace: IWorkSpace;
  pInFeatureClassName, pOutFeatureClassName: IFeatureClassName;
  pOutWorkspaceFactory: IWorkspaceFactory;
  pOutWorkerspace: IFeatureWorkspace;
  pOutWorkspaceName: IWorkspaceName;
  pOutDataSetName: IDatasetName;
  pFieldChecker: IFieldChecker;
  pEnumFieldError: IEnumFieldError;
  pOutFields: IFields;
  pFeatureDataConvert: IFeatureDataConverter;
  pQueryFilter: IQueryFilter;
  pSpatialFilter: ISpatialFilter;

  pFeature: IFeature;
begin
  if pFeatureClass = nil then
  begin
    exit;
  end;
  //得到输入
  pInDataSet := pFeatureClass as IDataSet;
  pInWorkSpace := pInDataSet.Workspace;
  pInFeatureClassName := pInDataSet.FullName as IFeatureClassName;

  //定义输出
  pOutWorkspaceFactory := CoShapefileWorkspaceFactory.create as IWorkspaceFactory;
  pOutWorkerspace := pOutWorkspaceFactory.OpenFromFile(pFilePath, 0) as IFeatureWorkspace;
  pOutDataSet := pOutWorkerspace as IDataset;
  pOutWorkspaceName := pOutDataSet.FullName as IWorkspaceName;
  pOutFeatureClassName := coFeatureClassName.Create as IFeatureClassName;

  pOutDataSetName := pOutFeatureClassName as IDatasetName;
  pOutDataSetName.Name := pFileName;
  pOutDataSetName.WorkspaceName := pOutWorkspaceName;

  //检查字段
  pFieldChecker := coFieldChecker.Create as IFieldChecker;
  pFieldChecker.InputWorkspace := pInWorkSpace;
  pFieldChecker.ValidateWorkspace := pOutWorkerspace as IWorkspace;
  pFieldChecker.Validate(pFeatureClass.Fields, pEnumFieldError, pOutFields);

  //要素筛选
  pQueryFilter := coQueryFilter.Create as IQueryFilter;
  pQueryFilter.WhereClause := '';

  //转换输出
  pFeatureDataConvert := coFeatureDataConverter.Create as IFeatureDataConverter;
  pFeatureDataConvert.ConvertFeatureClass(pInFeatureClassName, pQueryFilter, nil, pOutFeatureClassName, nil,   pOutFields, '', 100, 0);
end;