Country/territory: France
Central coordinates (latitude / longitude): 46°53'59"N (46.9000°) / 001°55'00"W (-1.9167°)
Area (reported): 47,000 hectares / 470.00 km² / 116,140 acres / 181.47 square miles
Area (GIS-derived): 45,642 hectares / 456.42 km² / 112,784 acres / 176.22 square miles
Altitude: 0–3 m (0–10 ft)