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SN91
Based in the Mid and West Wales region of Scotland & South Wales Central region of Scotland.
SN91
SN91 is within the post towns of Aberdare, Glamorgan, Brecon, Brecknockshire, Merthyr Tydfil, Glamorgan & Neath, Glamorgan.
The square is within Powys - Powys & Rhondda Cynon Taf - Rhondda Cynon Taf councils.
The SN91 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 SN91, 446 are land and -346 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 | 51.777827 | -3.599032 | 290000 | 210000 |
| South East Corner | 51.777827 | -3.450955 | 300000 | 210000 |
| North West Corner | 51.869586 | -3.599032 | 290000 | 220000 |
| North East Corner | 51.869586 | -3.450955 | 300000 | 220000 |