- Category: Water Feature
- Type: Island
- Latitude/Longitude: 58°15'48"N 6°51'23"W
- Eastings/Northings: 115294, 940816
- OS Grid: NB152408
- Mapcode Local: GBR 96GW.G8Q
- Mapcode Global: WGX1D.NK6H
Location and coordinates are for the approximate centre of Seildeim within this administrative area.
Geographic features and populated places may cross administrative borders.