Using alpha numeric grid systems
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USING ALPHA-NUMERIC GRID SYSTEMS. Alpha-Numeric Grid System

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Using alpha numeric grid systems

USING ALPHA-NUMERIC GRID SYSTEMS

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.



Road map symbols
ROAD MAP SYMBOLS

  • Most maps also use various colours and symbols to communicate information. For example, road maps will use red for major highways. Various symbols are used for people to quickly find locations of public use and necessity such as hospitals, airports, etc.

  • For Example: = = Hospital = airport



Try it out
TRY IT OUT!!

  • Complete Q.# 1 to 10 from page 32 of your text, using figure 3.2 (map and legend on p. 33).

  • This will reinforce what you have learned about cardinal and compass directions, using an alpha-numeric grid system like a road map and map symbols.