Based in the North East English Region.
The NU23 10 square kilometre grid intersects with the settlements of North Sunderland & Seahouses.
NU23 is within the post towns of Bamburgh, Northumberland, Chathill, Northumberland & Seahouses, Northumberland.
The square is within Northumberland council.
The NU23 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 NU23, 111 are land and -11 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 | 55.562762 | -1.684474 | 420000 | 630000 |
| South East Corner | 55.562762 | -1.524846 | 430000 | 630000 |
| North West Corner | 55.653122 | -1.684474 | 420000 | 640000 |
| North East Corner | 55.653122 | -1.524846 | 430000 | 640000 |