The TL3021 Square Kilometre

TL3021 National Grid Square

Based in the Eastern English Region.

TL3021 is within the post towns of Hertford, Hertfordshire, Stevenage, Hertfordshire & Ware, Hertfordshire.

The square is within East Hertfordshire District council.

The Point of Origin (0,0) is 574.23 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for TL3021

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Map Series	link	Ordnance Survey
Explorer 1:25,000 193 Luton and Stevenage	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Explorer 1:25,000 194 Hertford and Bishop's Stortford	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Landranger 1:50,000 166 Luton & Hertford	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 TL3021 and the vertical and horizontal line divides the square into four quadrants

Dividing the TL3021 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 , 30 and 21

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 + 30 + 3 + 21 + 5 would give you the six figure grid reference of TL303215

TL	30		21
TL	30	3	21	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	51.872204	-0.113068	530000	221000
South East Corner	51.872204	-0.098172	531000	221000
North West Corner	51.881424	-0.113068	530000	222000
North East Corner	51.881424	-0.098172	531000	222000