The SO7143 Square Kilometre

SO7143 National Grid Square

Based in the West Midlands English Region.

SO7143 is within the post town of Ledbury, Herefordshire.

The square is within County of Herefordshire council.

The Point of Origin (0,0) is 443.50 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for SO7143

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Map Series	link	Ordnance Survey
Explorer 1:25,000 190 Malvern Hills and Bredon Hill	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Landranger 1:50,000 149 Hereford & Leominster	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 SO7143 and the vertical and horizontal line divides the square into four quadrants

Dividing the SO7143 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 , 71 and 43

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 + 71 + 3 + 43 + 5 would give you the six figure grid reference of SO713435

SO	71		43
SO	71	3	43	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	52.084598	-2.424712	371000	243000
South East Corner	52.084598	-2.410033	372000	243000
North West Corner	52.093640	-2.424712	371000	244000
North East Corner	52.093640	-2.410033	372000	244000