The NX7577 Square Kilometre

NX7577 National Grid Square

Based in the South Scotland region of Scotland.

NX7577 is within the post town of Castle Douglas, Kirkcudbrightshire.

The square is within Dumfries and Galloway council.

The Point of Origin (0,0) is 639.18 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for NX7577

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Map Series	link	Ordnance Survey
Explorer 1:25,000 320 Castle Douglas, Loch Ken and New Galloway		Buy Direct from the Ordnance Survey
Landranger 1:50,000 84 Dumfries & Castle Douglas	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 NX7577 and the vertical and horizontal line divides the square into four quadrants

Dividing the NX7577 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. NX , 75 and 77

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 NX + 75 + 3 + 77 + 5 would give you the six figure grid reference of NX753775

NX	75		77
NX	75	3	77	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	55.071680	-3.959618	275000	577000
South East Corner	55.071680	-3.943528	276000	577000
North West Corner	55.080911	-3.959618	275000	578000
North East Corner	55.080911	-3.943528	276000	578000