France. Service de la carte geologique de France Explanatory text: 1 sheet in MC folder. North Decimal Degree 49.8383 South Decimal Degree 49.4788 East Decimal Degree 5.4516 West Decimal Degree 4.5624 Alternate title: Mezieres. 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."