In 1700 Cassini's father undertook a project to measure the meridian from Paris to Perpignan, which is 13 km west of the Mediterranean coast. Cassini assisted his father on this project and they obtained results which wrongly suggested that the Earth was elongated at the poles.
In 1700's Cassini ama undertook ng isang proyekto upang masukat ang katanghaliang tapat mula sa Paris sa Perpignan, na kung saan ay 13 km kanluran ng baybayin ng Mediterranean. Cassini assisted kanyang ama sa proyektong ito at sila na nakuha ng mga resulta na hindi wasto ang iminungkahing na ang Earth ay haba at ang mga poles.