The Key, or Legend, or a map gives a list of the symbols used on the map and what they represent.
There is a fairly standard set of symbols used for different types of map so that anyone looking at the map can understand what it is being shown. For example, on a weather map a cold front is shown as a black line with semi-circular bumps (in blue if coloured), a warm front is shown as a black line with triangles (in red if coloured) and an occluded front is shown as a black line with alternate semi-circular bumps and triangles.
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Another name for a map legend is key.
a map key
The name for the explanation on a map of the symbols and scale used in drawing that map is a "map key" or "legend." This key provides understanding of how to interpret the various symbols, colors, and markings on the map. It helps users navigate and understand the information presented on the map more effectively.
Another name for a relief map is a topographic map. These maps use contour lines to show the elevation and shape of the terrain, allowing the reader to visualize the three-dimensional landscape on a flat surface.
The part of a map that tells information about the map symbols is called the legend or key. It provides explanations or descriptions of the symbols used on the map, allowing users to interpret the information presented.