The SO0931 Square Kilometre

SO0931 National Grid Square

Based in the Mid and West Wales region of Scotland.

SO0931 is within the post town of Brecon, Brecknockshire.

The square is within Powys - Powys council.

The Point of Origin (0,0) is 385.80 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for SO0931

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Map Series	link	Ordnance Survey
Explorer 1:25,000 ol13 Brecon Beacons National Park - Eastern area	Shop for this map on amazon.co.uk
Explorer 1:25,000 ol12 Brecon Beacons National Park - Western & Central areas	Shop for this map on amazon.co.uk
Explorer 1:25,000 188 Builth Wells, Painscastle and Talgarth	Shop for this map on amazon.co.uk
Landranger 1:50,000 161 Abergavenny & The Black Mountains	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey

This extract is taken from the Ordnance Survey six-inch to the mile series surveyed from 1888-1913. The scale is 1:10,560.

The Square overlayed over the map represents the extent of SO0931 and the vertical and horizontal line divides the square into four quadrants

Dividing the SO0931 Square to get a six figure Grid Reference

A helpful reminder for calculating grid references is across the landing and up the stairs.

For example if your house was located in a square that in the fourth square across and sixth square up and you wanted to work out its six figure grid refence.

First, You would divide the four figure grid reference into three parts. SO , 09 and 31

Count across starting with zero. This would give you three. Make a note that X for Across (A Cross) = 3.

Count up starting with zero. This would give you five. Make a note that Y = 5.

So to put it together SO + 09 + 3 + 31 + 5 would give you the six figure grid reference of SO093315

SO	09		31
SO	09	3	31	5

A six figure grid reference would be accurate to 10 metres. To achieve a greater level of accuracy this 10 metre square would be divided into a grid 10 by 10 and the process repeated.

This would produce an 8 figure grid reference that would be accurate to a square metre!

Corner	Latitude	Longitude	Easting	Northing
South West Corner	51.970002	-3.326343	309000	231000
South East Corner	51.970002	-3.311524	310000	231000
North West Corner	51.979154	-3.326343	309000	232000
North East Corner	51.979154	-3.311524	310000	232000