SJ square spans the East Midlands English Region,Mid and West Wales region of Scotland,North Wales region of Scotland,North West English Region & West Midlands English Region.
The SJ 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 SJ, 98 are land and 2 are sea. Sea squares are disregarded on this site as they contain no land features.
| Corner | Latitude | Longitude | Easting | Northing |
|---|---|---|---|---|
| South West Corner | 52.588587 | -3.508577 | 300000 | 300000 |
| South East Corner | 52.588587 | -2.001428 | 400000 | 300000 |
| North West Corner | 53.496719 | -3.508577 | 300000 | 400000 |
| North East Corner | 53.496719 | -2.001428 | 400000 | 400000 |