What resource is utilized to identify vineyards or "crus" classified by commune?

The Ratti Map is a significant resource in the study of Italian wine, specifically for identifying vineyards or "crus" that are classified by commune. This map, created by the Italian enologist Renato Ratti, illustrates the unique terroirs and specific vineyard sites in the Barolo region. It provides detailed geographic information that helps wine professionals and enthusiasts understand the relationship between the land and the characteristics of the wine produced in each area.

This resource is particularly valuable because it highlights the nuances of different cru within a single commune, showcasing how small variations in location, altitude, and soil type can influence the style and quality of the wine. By referring to the Ratti Map, one can gain insights into the specific growing conditions and historical significance that each vineyard holds.

While there are other resources that address various aspects of Italian wine, such as the Prosecco Guide, DOC Regulations, and Vines of Tuscany, they do not focus as specifically on the vineyard classifications and delineations by commune as the Ratti Map does. The Ratti Map stands out as an essential tool for understanding the intricacies of vineyard designation in the context of Italian wine regions.