The TQ4506 Square Kilometre

TQ4506 National Grid Square

Based in the South East English Region.

TQ4506 is within the post town of Lewes, Sussex.

The square is within Lewes District council.

The Point of Origin (0,0) is 555.21 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for TQ4506

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Map Series	link	Ordnance Survey
Explorer 1:25,000 ol11 Brighton & Hove	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Explorer 1:25,000 ol25 Eastbourne & Beachy Head	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Landranger 1:50,000 198 Brighton & Lewes	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 TQ4506 and the vertical and horizontal line divides the square into four quadrants

Dividing the TQ4506 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. TQ , 45 and 06

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 TQ + 45 + 3 + 06 + 5 would give you the six figure grid reference of TQ453065

TQ	45		06
TQ	45	3	06	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	50.835118	0.057832	545000	106000
South East Corner	50.835118	0.072421	546000	106000
North West Corner	50.844356	0.057832	545000	107000
North East Corner	50.844356	0.072421	546000	107000