When Alessandro Masnaghetti looks at vineyards, he sees things most of us don't. Standing atop a hill in the middle of the Barolo appellation, he faces some of Italy's most renowned vine-planted hillsides. He analyzes the way the sun and shadows fall on every contour, considers each exposition and notes the grade of each slope. Then he melds this information into his knowledge of where Nebbiolo grapes ripen to produce the deepest, most complex wines. And at 52, he is Italy's leading vineyard cartographer and a meticulous student of geography's influence on wine. Wine Spectator's Robert Camuto explains.