France. Service de la carte geologique de France Explanatory text: MC folder, 6p. North Decimal Degree 42.1290 South Decimal Degree 41.7690 East Decimal Degree 8.9218 West Decimal Degree 8.4932 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."