The NO1166 Square Kilometre

NO1166 National Grid Square

Based in the Mid Scotland and Fife region of Scotland.

NO1166 is within the post town of Blairgowrie, Perthshire.

The square is within Perth and Kinross council.

The Point of Origin (0,0) is 826.73 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for NO1166

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Map Series	link	Ordnance Survey
Explorer 1:25,000 ol52 Glen Shee & Braemar	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Landranger 1:50,000 43 Braemar to Bliar Atholl	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 NO1166 and the vertical and horizontal line divides the square into four quadrants

Dividing the NO1166 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. NO , 11 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 NO + 11 + 3 + 66 + 5 would give you the six figure grid reference of NO113665

NO	11		66
NO	11	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	56.777026	-3.458358	311000	766000
South East Corner	56.777026	-3.441651	312000	766000
North West Corner	56.786197	-3.458358	311000	767000
North East Corner	56.786197	-3.441651	312000	767000