Country/territory: France
Central coordinates (latitude / longitude): 48°40'00"N (48.6667°) / 003°53'59"W (-3.9000°)
Area (reported): 170,304 hectares / 1,703.04 km² / 420,830 acres / 657.55 square miles
Area (GIS-derived): 170,670 hectares / 1,706.70 km² / 421,735 acres / 658.96 square miles
Altitude: 0–15 m (0–49 ft)