The SU4805 Square Kilometre

SU4805 National Grid Square

Based in the South East English Region.

SU4805 is within the post town of Southampton, Hampshire.

The square is within Eastleigh District & Fareham District councils.

The Point of Origin (0,0) is 460.14 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for SU4805

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Map Series	link	Ordnance Survey
Explorer 1:25,000 ol22 New Forest, Southampton, Ringwood, Ferndown, Lymington, Christchurch and Bournemouth	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Explorer 1:25,000 ol3 Meon Valley, Porstmouth, Gosport & Fareham	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Landranger 1:50,000 196 The Solent & Isle of Wight	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 SU4805 and the vertical and horizontal line divides the square into four quadrants

Dividing the SU4805 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. SU , 48 and 05

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 SU + 48 + 3 + 05 + 5 would give you the six figure grid reference of SU483055

SU	48		05
SU	48	3	05	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	50.842448	-1.319624	448000	105000
South East Corner	50.842448	-1.305289	449000	105000
North West Corner	50.851523	-1.319624	448000	106000
North East Corner	50.851523	-1.305289	449000	106000