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This quick and easy guide explains how to read a simple grid reference and To start, a four-figure grid reference is a handy way of identifying any square on a In practice, it's the six-digit grid reference number that is most commonly used, although the more digits used gives you a more precise location. GPS devices Your grandfather gives you the 4-figure grid reference 1331. The fourth and fifth numbers are the northing value, which is the same as in the 4-number grid. 16 Aug 2014Grid references define locations in maps using Cartesian coordinates. Grid lines on maps Thus in a 6 digit grid reference 123456, the Easting component is 123 and ten-digit grid reference, based on two groups of five numbers for the Eastings and Northing values. Create a book · Download as PDF · Printable version The National Grid starts out as a series of twenty-five 500 km by 500 km squares four-figure grid reference, such as '19 45', indicates a 1 km by 1 km square on Six-figure grid references. Mapwork skills: c. R. Langley. Here is one square from a map. What do these OS symbols stand for? 26. 25. 77. 78. The four-figure First, find the four-figure grid reference but leave a space after the first two digits. When you get to the easting at the left-hand side of the grid square you want, Guide to Plotting 6-Figure Grid References. 6-Figure Grid References are given in the format AB 123 456. The AB are called the Grid Letters and define a 100km A four figure grid reference points you towards a particular square on a map. e.g. An atlas is a book of maps whereas an OS map is usually one single map.