The NR3666 Square Kilometre

NR3666 National Grid Square

Based in the Highlands and Islands region of Scotland.

NR3666 is within the post town of Isle Of Islay, Argyllshire.

The square is within Argyll and Bute council.

The Point of Origin (0,0) is 679.74 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for NR3666

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Map Series	link	Ordnance Survey
Explorer 1:25,000 352 Islay South	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Explorer 1:25,000 353 Islay North	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Landranger 1:50,000 60 Islay		Buy Direct from the Ordnance Survey
Landranger 1:50,000 61 Jura & Colonsay		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 NR3666 and the vertical and horizontal line divides the square into four quadrants

Dividing the NR3666 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. NR , 36 and 66

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 NR + 36 + 3 + 66 + 5 would give you the six figure grid reference of NR363665

NR	36		66
NR	36	3	66	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	55.814856	-6.216610	136000	666000
South East Corner	55.814856	-6.199725	137000	666000
North West Corner	55.824362	-6.216610	136000	667000
North East Corner	55.824362	-6.199725	137000	667000