- Category: Water Feature
- Type: Island
- Latitude/Longitude: 57°48'2"N 8°34'15"W
- Eastings/Northings: 9893, 897976
- OS Grid: NF098979
- Mapcode Local: GBR 5873.H05
- Mapcode Global: WGQX7.96S7
Location and coordinates are for the approximate centre of Giasgeir within this administrative area.
Geographic features and populated places may cross administrative borders.