France. Bureau de recherches geologiques et minieres [BRGM]. Carte geologique CG-121(1954) France. Service de la carte geologique de France North Decimal Degree 47.3387 South Decimal Degree 46.9789 East Decimal Degree 1.9137 West Decimal Degree 1.0667 Relief shown by hachures. Principal meridian: Paris. Longitude is given in centesimal values (100 grades = 90 degrees) .The Service de la carte geologique de la France was integrated to the BRGM to become the only France Service geologique national. Based on "Carte topograqphique de l'etat major."