EntityQ893387· pop 6· linked from 22 articlesrepeating circleSign in to savetype of angular measurement instrument, notably used for navigationConnectionsBarcelonaEntitymetreEntityInternational Standard Book NumberEntitymeasurementEntitytelescopeEntityDunkirkEntitydigital object identifierEntitycivil engineeringEntitygeodesyEntityhistory of scienceEntityzenithEntityConservatoire national des Arts et MétiersEntitystandardizationEntitygradianEntityPierre MéchainEntityJean-Baptiste Joseph DelambreEntitymeasurement errorEntityJean-Charles de BordaEntityCésar-François Cassini de ThuryEntityParis meridianEntityCategoriesSurveying instruments