The TA1621 Square Kilometre

TA1621 National Grid Square

Based in the Yorkshire and the Humber English Region.

TA1621 is within the post town of Immingham, Lincolnshire.

The square is within North Lincolnshire council.

The Point of Origin (0,0) is 665.96 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for TA1621

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Map Series	link	Ordnance Survey
Explorer 1:25,000 284 Grimsby, Cleethorpes and Immingham, Caistor and North Thoresby	Shop for this map on amazon.co.uk
Landranger 1:50,000 107 Kingston upon Hull	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Landranger 1:50,000 113 Grimsby & Cleethorpes	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 TA1621 and the vertical and horizontal line divides the square into four quadrants

Dividing the TA1621 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. TA , 16 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 TA + 16 + 3 + 21 + 5 would give you the six figure grid reference of TA163215

TA	16		21
TA	16	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	53.672407	-0.245548	516000	421000
South East Corner	53.672407	-0.230042	517000	421000
North West Corner	53.681613	-0.245548	516000	422000
North East Corner	53.681613	-0.230042	517000	422000