The SU7915 Square Kilometre

SU7915 National Grid Square

Based in the South East English Region.

SU7915 is within the post town of Chichester, Sussex.

The square is within Chichester District council.

The Point of Origin (0,0) is 492.61 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for SU7915

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Map Series	link	Ordnance Survey
Explorer 1:25,000 ol8 Chichester, South Harting & Selsey	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Landranger 1:50,000 197 Chichester & The Downs	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 SU7915 and the vertical and horizontal line divides the square into four quadrants

Dividing the SU7915 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 , 79 and 15

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 + 79 + 3 + 15 + 5 would give you the six figure grid reference of SU793155

SU	79		15
SU	79	3	15	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	50.928907	-0.877242	479000	115000
South East Corner	50.928907	-0.862796	480000	115000
North West Corner	50.938036	-0.877242	479000	116000
North East Corner	50.938036	-0.862796	480000	116000