The NO2531 Square Kilometre

NO2531 National Grid Square

Based in the Mid Scotland and Fife region of Scotland.

NO2531 is within the post town of Perth, Perthshire.

The square is within Perth and Kinross council.

The Point of Origin (0,0) is 799.99 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for NO2531

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Map Series	link	Ordnance Survey
Explorer 1:25,000 380 Dundee and Sidlaw Hills		Buy Direct from the Ordnance Survey
Landranger 1:50,000 53 Blairgowrie	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 NO2531 and the vertical and horizontal line divides the square into four quadrants

Dividing the NO2531 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 , 25 and 31

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 + 25 + 3 + 31 + 5 would give you the six figure grid reference of NO253315

NO	25		31
NO	25	3	31	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	56.465135	-3.219093	325000	731000
South East Corner	56.465135	-3.202580	326000	731000
North West Corner	56.474275	-3.219093	325000	732000
North East Corner	56.474275	-3.202580	326000	732000