The TL3677 Square Kilometre

TL3677 National Grid Square

Based in the Eastern English Region.

The TL3677 square kilometre intersects with the settlement of Somersham.

TL3677 is within the post town of Huntingdon, Huntingdonshire.

The square is within Huntingdonshire District council.

The Point of Origin (0,0) is 603.34 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for TL3677

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Map Series	link	Ordnance Survey
Explorer 1:25,000 225 Huntingdon and St.Ives, Grafham water	Shop for this map on amazon.co.uk
Landranger 1:50,000 142 Peterborough	Shop for this map on amazon.co.uk

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 TL3677 and the vertical and horizontal line divides the square into four quadrants

Dividing the TL3677 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. TL , 36 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 TL + 36 + 3 + 77 + 5 would give you the six figure grid reference of TL363775

TL	36		77
TL	36	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	52.373935	-0.003610	536000	277000
South East Corner	52.373935	0.011478	537000	277000
North West Corner	52.383168	-0.003610	536000	278000
North East Corner	52.383168	0.011478	537000	278000