- Category: Water Feature
- Type: Island
- Latitude/Longitude: 49°57'6"N 6°15'25"W
- Eastings/Northings: 94736, 14424
- OS Grid: SV947144
- Mapcode Local: GBR BXYT.0R0
- Mapcode Global: VGYBZ.HGGT
Location and coordinates are for the approximate centre of Great Ganilly within this administrative area.
Geographic features and populated places may cross administrative borders.