EntityQ1259418· pop 11· linked from 55 articlesGrade measurementSign in to saveTechnique of determining the radius of EarthConnectionslatitudeEntityParis meridianEntityWillebrord SnelliusEntityEarth radiusEntitylongitudeEntityreference ellipsoidEntityJean FernelEntityYi XingEntitygeodetic control networkEntitygeodetic astronomyEntitymeridian arcEntityFrench Geodesic MissionsEntitygeographical distanceEntityGermanEntitystarEntityBlack SeaEntityArctic OceanEntityCarl Friedrich GaussEntityJules VerneEntitygeographic coordinate systemEntityCategoriesGeodetic surveysHistory of measurement