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$line ={'Station1'=>{'x'=>'','y'=>'','z'=>}, 'Station2'=>{'x'=>'','y'=>'','z'=>} }
$line ={'line1'=>={'Station1'=>{'x'=>'','y'=>'','z'=>}, 'Station2'=>{'x'=>'','y'=>'','z'=>} ... 'Station2'=>{'x'=>'','y'=>'','z'=>} } }