The ST4255 Square Kilometre

ST4255 National Grid Square

Based in the South West English Region.

ST4255 is within the post town of Axbridge, Somerset.

The square is within Sedgemoor District council.

The Point of Origin (0,0) is 375.49 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for ST4255

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Map Series	link	Ordnance Survey
Explorer 1:25,000 141 Cheddar Gorge and Mendip Hills West	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Landranger 1:50,000 172 Bristol & Bath	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Landranger 1:50,000 182 Weston-super-Mare & Bridgwater	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 ST4255 and the vertical and horizontal line divides the square into four quadrants

Dividing the ST4255 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. ST , 42 and 55

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 ST + 42 + 3 + 55 + 5 would give you the six figure grid reference of ST423555

ST	42		55
ST	42	3	55	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	51.291160	-2.833321	342000	155000
South East Corner	51.291160	-2.818819	343000	155000
North West Corner	51.300252	-2.833321	342000	156000
North East Corner	51.300252	-2.818819	343000	156000