The NA9913 Square Kilometre

NA9913 National Grid Square

Based in the Highlands and Islands region of Scotland.

NA9913 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 918.35 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for NA9913

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

Map Series	link	Ordnance Survey
Explorer 1:25,000 456 North Harris and Loch Seaforth/Ceann a Tuath Na Hearadh Agus Loch Shiphoirt
Landranger 1:50,000 13 West Lewis & North Harris	Shop for this map on amazon.co.uk	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 NA9913 and the vertical and horizontal line divides the square into four quadrants

Dividing the NA9913 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. NA , 99 and 13

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 NA + 99 + 3 + 13 + 5 would give you the six figure grid reference of NA993135

NA	99		13
NA	99	3	13	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	58.003827	-7.098574	99000	913000
South East Corner	58.003827	-7.080446	100000	913000
North West Corner	58.013449	-7.098574	99000	914000
North East Corner	58.013449	-7.080446	100000	914000