The TF3439 Square Kilometre

TF3439 National Grid Square

Based in the East Midlands English Region.

TF3439 is within the post town of Boston, Lincolnshire.

The square is within Boston District council.

The Point of Origin (0,0) is 632.52 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for TF3439

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Map Series	link	Ordnance Survey
Explorer 1:25,000 261 Boston	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Explorer 1:25,000 249 Spalding and Holbeach		Buy Direct from the Ordnance Survey
Landranger 1:50,000 131 Boston & Spalding	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 TF3439 and the vertical and horizontal line divides the square into four quadrants

Dividing the TF3439 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. TF , 34 and 39

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 TF + 34 + 3 + 39 + 5 would give you the six figure grid reference of TF343395

TF	34		39
TF	34	3	39	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	52.931461	-0.007821	534000	339000
South East Corner	52.931461	0.007462	535000	339000
North West Corner	52.940695	-0.007821	534000	340000
North East Corner	52.940695	0.007462	535000	340000