A map, any map is a drawing of an area as seen from above. It is important that it has a scale, which is measureable & constant. It has to be oriented, that it it is known which way is up, so to speak. Therefore Scale & Direction are important features. Different types of map are able to show different things: Rainfall, temprature, air,pressure, all sort of variables.
A topographic map.
A map's legend shows what symbols and their meaning is used on the map.
The map key is a list of symbols and their meaning used in the map.
map
Key
map keys
'Chart', as in, a sea map.
A conformal map preserves shape, meaning angles are maintained. A equal-area map preserves size, meaning areas are accurately represented.
nature art
It is a world map that shows the political nature of countries, states, etc.
map
The meaning of symbols on a map are stated in the legend for that map which will be attached to it or printed in one corner of the map.