Based in the Highlands and Islands region of Scotland.
The HY40 10 square kilometre grid intersects with the settlements of Kirkwall,St Mary's & Tankerness.
HY40 is within the post towns of Kirkwall, Orkney, Orkney & Stromness, Orkney.
The square is within Orkney Islands council.
The HY40 national grid square measures 10 km by 10 km and has an area of 1,000 kilometres squared.
The technical term for a 10 km map square is a Hectad.
When this 10 km square is divided into a grid 10 by 10 it gives the next size of grid square. This unit is called a Monad and measures 1km square. 100 monads fit in a 10km square.
Out of the monads generated from square HY40, 176 are land and -76 are sea. Sea squares are disregarded on this site as they contain no land features.
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| Corner | Latitude | Longitude | Easting | Northing |
|---|---|---|---|---|
| South West Corner | 58.883139 | -3.045264 | 340000 | 1000000 |
| South East Corner | 58.883139 | -2.869106 | 350000 | 1000000 |
| North West Corner | 58.974219 | -3.045264 | 340000 | 1010000 |
| North East Corner | 58.974219 | -2.869106 | 350000 | 1010000 |