The SO8511 Square Kilometre

SO8511 National Grid Square

Based in the South West English Region.

SO8511 is within the post town of Stroud, Gloucestershire.

The square is within Stroud District council.

The Point of Origin (0,0) is 439.03 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for SO8511

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Map Series	link	Ordnance Survey
Explorer 1:25,000 179 Gloucester, Cheltenham and Stroud	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Landranger 1:50,000 162 Gloucester & Forest of Dean	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 SO8511 and the vertical and horizontal line divides the square into four quadrants

Dividing the SO8511 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 , 85 and 11

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 + 85 + 3 + 11 + 5 would give you the six figure grid reference of SO853115

SO	85		11
SO	85	3	11	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	51.797449	-2.218954	385000	211000
South East Corner	51.797449	-2.204410	386000	211000
North West Corner	51.806467	-2.218954	385000	212000
North East Corner	51.806467	-2.204410	386000	212000