Bug 312761 It makes no difference changing the series labels position in Radar chart.[13]
chart/org.eclipse.birt.chart.ui/src/org/eclipse/birt/chart/ui/util/ChartUIUtil.java
.get( 0 );
		EList<Query> dds = sdOverlay.getDesignTimeSeries( ).getDataDefinition( );
		for ( int i = 0; i < dds.size( ); i++ )
		{
			dds.get( i ).setDefinition( "" ); 
		}
		
		SampleData sd = chartModel.getSampleData( );
		
		
		int currentSize = sd.getOrthogonalSampleData( ).size( );
		OrthogonalSampleData sdOrthogonal = chartModel.getSampleData( )
				.getOrthogonalSampleData( )
				.get( 0 )
				.copyInstance( );
		sdOrthogonal.setDataSetRepresentation( ChartUtil.getNewSampleData( overlayAxis.getType( ),
				currentSize ) );
		sdOrthogonal.setSeriesDefinitionIndex( currentSize );
		sdOrthogonal.eAdapters( ).addAll( sd.eAdapters( ) );
		sd.getOrthogonalSampleData( ).add( sdOrthogonal );
		chartModel.getAxes( ).get( 0 ).getAssociatedAxes( ).add( overlayAxis );
		
		ChartAdapter.endIgnoreNotifications( );
		setSeriesName( chartModel );
	}
	/**
	 * Add default name for series.
	 * 
	 * @param chart
	 * @param series