The TM4499 Square Kilometre

TM4499 National Grid Square

Based in the Eastern English Region.

TM4499 is within the post towns of Great Yarmouth, Norfolk & Norwich, Norfolk.

The square is within Great Yarmouth District & South Norfolk District councils.

The Point of Origin (0,0) is 710.03 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for TM4499

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Map Series	link	Ordnance Survey
Explorer 1:25,000 ol40 The Broads	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Landranger 1:50,000 134 Norwich & The Broads	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 TM4499 and the vertical and horizontal line divides the square into four quadrants

Dividing the TM4499 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. TM , 44 and 99

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 TM + 44 + 3 + 99 + 5 would give you the six figure grid reference of TM443995

TM	44		99
TM	44	3	99	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	52.533739	1.596305	644000	299000
South East Corner	52.533739	1.611755	645000	299000
North West Corner	52.543159	1.596305	644000	300000
North East Corner	52.543159	1.611755	645000	300000