The NF9990 Square Kilometre

NF9990 National Grid Square

Based in the Highlands and Islands region of Scotland.

NF9990 is within the post town of Isle Of Harris, Inverness-shire.

The square is within Na h-Eileanan an Iar council.

The Point of Origin (0,0) is 895.49 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for NF9990

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Map Series	link	Ordnance Survey
Explorer 1:25,000 455 South Harris/Ceann a Deas Na Hearadh
Landranger 1:50,000 18 South of Harris & St Kilda	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 NF9990 and the vertical and horizontal line divides the square into four quadrants

Dividing the NF9990 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. NF , 99 and 90

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 NF + 99 + 3 + 90 + 5 would give you the six figure grid reference of NF993905

NF	99		90
NF	99	3	90	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	57.798057	-7.069426	99000	890000
South East Corner	57.798057	-7.051410	100000	890000
North West Corner	57.807675	-7.069426	99000	891000
North East Corner	57.807675	-7.051410	100000	891000