bct home

UK Grid References

The four figure grid reference you are given e.g. SN6727 relates to a 1km square.

The National Grid system covers Great Britain with 100km grid squares.

Each 100km square in Scotland, England and Wales is identified by 2 letters (e.g. SN) and a single letter in Northern Ireland.

Each 100km square is then further divided into 10km squares by a set of grid lines running vertically left to right and horizontally from bottom to top within the square.

If we zoom into the 100km square SN, you can see the grid that divides it again into 10km squares.

The lines that vertically run left to right (west to east) are called eastings because they are numbered from 0 to 9 progressing eastwards.

The grid lines that run horizontally from bottom to top (south to north) are called northings because they are numbered
0 – 9 progressing from south to North.

Always read grid references by eastings first (left to right) and then northings. If you have trouble remembering think of along the hall and then up the stairs!

In the example shown the red square is SN62

 

 

planning your survey
nbmp
bat detectors
support surveying walks
surveying at spots
sign up
after your survey
sign up
links
 
 

The Bat Conservation Trust retains intellectual copyright of the material contained in this tutorial.
Any unauthorised use will be considered a breach of that copyright.