The TF6640 Square Kilometre

TF6640 National Grid Square

Based in the Eastern English Region.

The TF6640 square kilometre intersects with the settlement of Hunstanton.

TF6640 is within the post town of Hunstanton, Norfolk.

The square is within King's Lynn and West Norfolk District council.

The Point of Origin (0,0) is 660.27 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for TF6640

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

Map Series	link	Ordnance Survey
Explorer 1:25,000 250 Norfolk Coast West	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Landranger 1:50,000 132 North West Norfolk	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 TF6640 and the vertical and horizontal line divides the square into four quadrants

Dividing the TF6640 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 , 66 and 40

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 + 66 + 3 + 40 + 5 would give you the six figure grid reference of TF663405

TF	66		40
TF	66	3	40	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	52.931454	0.468343	566000	340000
South East Corner	52.931454	0.483721	567000	340000
North West Corner	52.940745	0.468343	566000	341000
North East Corner	52.940745	0.483721	567000	341000