Ethnologists and geographs are very much requested today to take part in discussions about local and traditional agricultural and food productions. They often share common research themes – such as patrimony, locality, cultural frontiers – and their views complement one another. Both disciplines are needed by experts to help them delimit the areas of products with a guarantee of origin. When travelling through the country together ethnologists and geographs can observe similarities, differences and also subtleties, more especially methodological, in their appreciations and interpretations. But their opinions often reinforce each other against those of researchers in other disciplines (earth or life sciences) working on the same topic.