The NH3405 Square Kilometre

NH3405 National Grid Square

Based in the Highlands and Islands region of Scotland.

NH3405 is within the post town of Invergarry, Inverness-shire.

The square is within Highland council.

The Point of Origin (0,0) is 838.32 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for NH3405

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Map Series	link	Ordnance Survey
Explorer 1:25,000 400 Loch Lochy and Glen Roy - Spean Bridge, Invergarry and Fort Augustus
Landranger 1:50,000 34 Fort Augustus & Glen Albyn

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 NH3405 and the vertical and horizontal line divides the square into four quadrants

Dividing the NH3405 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. NH , 34 and 05

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 NH + 34 + 3 + 05 + 5 would give you the six figure grid reference of NH343055

NH	34		05
NH	34	3	05	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	57.105892	-4.743033	234000	805000
South East Corner	57.105892	-4.725880	235000	805000
North West Corner	57.115225	-4.743033	234000	806000
North East Corner	57.115225	-4.725880	235000	806000