The SP3871 Square Kilometre

SP3871 National Grid Square

Based in the West Midlands English Region.

SP3871 is within the post towns of Coventry, Warwickshire & Rugby, Warwickshire.

The square is within Rugby District & Warwick District councils.

The Point of Origin (0,0) is 515.06 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for SP3871

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Map Series	link	Ordnance Survey
Explorer 1:25,000 221 Coventry and Warwick, Royal Leamington Spa and Kenilworth	Shop for this map on amazon.co.uk
Landranger 1:50,000 140 Leicester Coventry & Rugby	Shop for this map on amazon.co.uk

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 SP3871 and the vertical and horizontal line divides the square into four quadrants

Dividing the SP3871 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. SP , 38 and 71

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 SP + 38 + 3 + 71 + 5 would give you the six figure grid reference of SP383715

SP	38		71
SP	38	3	71	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	52.335721	-1.443716	438000	271000
South East Corner	52.335721	-1.428925	439000	271000
North West Corner	52.344781	-1.443716	438000	272000
North East Corner	52.344781	-1.428925	439000	272000