USING ALPHA-NUMERIC GRID SYSTEMS. Alpha-Numeric Grid System
Alpha-Numeric Grid System
Of all maps, road maps are perhaps the most commonly used. A road map uses an alpha-numeric grid referencing system that people can use to locate places. The road map area will have a grid made up of horizontal and vertical grid lines over it. The rows are usually labelled with a letter (A, B, C, etc.) and the columns are usually labelled with a number (1, 2, 3, etc.), though the coding can be used either way. Road maps have an index of alphabetically listed places beside which is the alpha-numeric grid reference for the grid square the place you need to find is located in.