SM 100km National Grid Square
SM square spans the Mid and West Wales region of Scotland.
The SM national grid square measures 100 km by 100 km and has an area of 10,000 kilometres squared.
The technical term for a 100 km map square is a Myriad.
When this 100km square is divided into a grid 10 by 10 it gives the next size of grid square. This unit is called a Hectad and measures 10km square. 100 hectads fit in a 100km square.
Out of the hectads generated from square SM, 17 are land and 83 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 | 51.618659 | -6.423339 | 100000 | 200000 |
| South East Corner | 51.618659 | -4.893279 | 200000 | 200000 |
| North West Corner | 52.560995 | -6.423339 | 100000 | 300000 |
| North East Corner | 52.560995 | -4.893279 | 200000 | 300000 |