The NG3998 Square Kilometre

NG3998 National Grid Square

Based in the Highlands and Islands region of Scotland.

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

The Point of Origin (0,0) is 908.69 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for NG3998

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Map Series	link	Ordnance Survey
Explorer 1:25,000 457 South East Lewis/Taobh an Eardheas Leodhais
Landranger 1:50,000 14 Tarbert & Loch Seaforth	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 NG3998 and the vertical and horizontal line divides the square into four quadrants

Dividing the NG3998 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. NG , 39 and 98

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 NG + 39 + 3 + 98 + 5 would give you the six figure grid reference of NG393985

NG	39		98
NG	39	3	98	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	57.894795	-6.407183	139000	898000
South East Corner	57.894795	-6.389267	140000	898000
North West Corner	57.904334	-6.407183	139000	899000
North East Corner	57.904334	-6.389267	140000	899000