Based in the North Wales region of Scotland.
The SH28 10 square kilometre grid intersects with the settlements of Holyhead,Trearddur & Y Fali.
SH28 is within the post town of Holyhead, Anglesey.
The square is within Sir Ynys Mon - Isle of Anglesey council.
The SH28 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 SH28, 230 are land and -130 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 | 53.286336 | -4.707398 | 220000 | 380000 |
| South East Corner | 53.286336 | -4.551871 | 230000 | 380000 |
| North West Corner | 53.379437 | -4.707398 | 220000 | 390000 |
| North East Corner | 53.379437 | -4.551871 | 230000 | 390000 |