France. Service de la carte geologique de France North Decimal Degree 46.9729 South Decimal Degree 46.6133 East Decimal Degree 1.0752 West Decimal Degree 0.2342 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.