| Find a grid reference |
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| The Ordnance Survey provide a splendid resource
OpenSpace which allows you to read a grid reference directly from the
pointer on a map. 1 - Use the zoom controls on the LH side of the map to change resolution, and drag with the mouse to the required location. 2 - Use the mouse to move the pointer to the required position. 3 - Without changing the pointer position, record the top two lines of coordinates at top right. The grid reference is shown as 6 digits for each of easting and northing. To convert to the format we require for database records is simple. Here is a worked example, or use the form below valid only for Highland Region locations to do the hard work. EAST: 237510 NORTH: 870834 The 100km square is given by the first digit in each coordinate, so 28. To convert to letters, the 100km squares in Highland are 19 is NB; 29 is NC; 39 is ND; 18 is NG; 28 is NH; 38 is NJ; 17 is NM; 18 is NN. The remaining digits follow, easting then northing ('along the corridor and up the stairs'). The converted OSGR is NH37 (10km); NH3770 (1km); NH375708 (100m); NH37517083 (10m); NH3751070834 (1m precision). |
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