Search for Grid Square by Postcode

The SN6604 Square Kilometre

SN6604 National Grid Square

Based in the South Wales West region of Scotland.

SN6604 is within the post town of Swansea, Glamorgan.

The square is within Abertawe - Swansea council.

The Point of Origin (0,0) is 335.22 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for SN6604

If you purchase a map through the links below, we may earn an affiliate commission.

Map SerieslinkOrdnance Survey
Explorer 1:25,000 165 Swansea, Neath and Port TalbotShop for this map on amazon.co.uk
Explorer 1:25,000 178 Llanelli and Ammanford/RhydamanShop for this map on amazon.co.uk
Landranger 1:50,000 159 Swansea & GowerShop for this map on amazon.co.ukBuy Direct from the Ordnance Survey
NW
N
NE
W
Key of Northings for the SN6604 National Grid Square
Map of the SN6604 National Grid Square
Key of Eastings for the SN6604 National Grid Square
E
SW
S
SE
A historical Ordnance Survey Map Sheet showing Grid Square SN6604.

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 SN6604 and the vertical and horizontal line divides the square into four quadrants

Dividing the SN6604 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. SN , 66 and 04

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 SN + 66 + 3 + 04 + 5 would give you the six figure grid reference of SN663045

SN6604
SN663045

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!


CornerLatitudeLongitudeEastingNorthing
South West Corner51.718676-3.941611266000204000
South East Corner51.718676-3.926759267000204000
North West Corner51.727900-3.941611266000205000
North East Corner51.727900-3.926759267000205000