The ST4305 Square Kilometre

ST4305 National Grid Square

Based in the South West English Region.

ST4305 is within the post town of Beaminster, Dorset.

The square is within Dorset council.

The Point of Origin (0,0) is 358.71 Kilometres away. This is where the National Grid starts around 80 kilometres west of the Isles of Scilly.

Ordnance Survey Maps for ST4305

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Map Series	link	Ordnance Survey
Explorer 1:25,000 116 Lyme Regis and Bridport	Shop for this map on amazon.co.uk	Buy Direct from the Ordnance Survey
Landranger 1:50,000 193 Taunton & Lyme Regis	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 ST4305 and the vertical and horizontal line divides the square into four quadrants

Dividing the ST4305 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. ST , 43 and 05

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 ST + 43 + 3 + 05 + 5 would give you the six figure grid reference of ST433055

ST	43		05
ST	43	3	05	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	50.841695	-2.811074	343000	105000
South East Corner	50.841695	-2.796716	344000	105000
North West Corner	50.850785	-2.811074	343000	106000
North East Corner	50.850785	-2.796716	344000	106000