Shape size pattern colour orientation and value are important to mapping because they explain the map in more detail!
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Symbols are used to determine what something is without spelling it out entirely on the map. Symbols are also easier to read or understand.
Symbols are used where to write the name of the feature, place, etc, would take up too much space and so obscure other important detail.
Symbols are used because writing on the map will take up more room, and may obscure details.
A compass is an instrument for determining directions and a legend is a table on a map, chart, or the like, listing and explaining the symbols used.
there are two thing a legend is, 1. a legend on a map tells you what shapes and colours mean on a map, 2. a legend is a kind of story
The "legend" of a map tells more than just the map scale. It defines other features such as what the various symbols on the map mean, the colors used for elevation, and the types of cities, roads, bridges, and borders shown. The legend may or may not include the compass rose. The maker or copyright on the map is usually in the legend as well.
Symbols are used in lab procedures and in other kinds of instructions to alert you to important information or to the potential for hazards if procedures are not carefully followed.
Safety symbols must be instantly recognizable across language or cultural barriers. Standardization of signs promotes recognition so that, for example, in the event of an emergency people instantly recognize the sign that points to the nearest emergency exit.