France. Service de la carte geologique de France North Decimal Degree 49.4975 South Decimal Degree 49.1377 East Decimal Degree 2.7790 West Decimal Degree 1.8954 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