A map is an aerial projection of some terrain. Maps will usually have special symbols to represent objects or features.
Some people prefer to use the map name than the map number.
For example, Wagga Wagga. The number of the map indicates the scale and the location in Australia the map presents. Maps are drawn to different scale. This is a different numbering system to the one above. The quadrants start with 1 being the North East, rotating clockwise to 4 being the North West.