France. Service de la carte geologique de France North Decimal Degree 46.9610 South Decimal Degree 46.6012 East Decimal Degree 0.2342 West Decimal Degree -0.6061 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." Map is a photocopy.