- Category: Water Feature
- Type: Island
- Latitude/Longitude: 57°51'52"N 6°38'45"W
- Eastings/Northings: 124565, 895605
- OS Grid: NG245956
- Mapcode Local: GBR 97ZY.2MP
- Mapcode Global: WGX3F.WLD6
Location and coordinates are for the approximate centre of Grèineam within this administrative area.
Geographic features and populated places may cross administrative borders.