- Category: Water Feature
- Type: Island
- Latitude/Longitude: 58°6'22"N 7°7'40"W
- Eastings/Northings: 98058, 924510
- OS Grid: NA980245
- Mapcode Local: GBR 87S9.HWP
- Mapcode Global: WGW0X.GJY2
Location and coordinates are for the approximate centre of Grèineam within this administrative area.
Geographic features and populated places may cross administrative borders.