A feature on a map (to make it distinguishable) is to make each picture unique to itself, so you can easily tell the difference between two features. If you are making a map for school of a country or continent make it easy to read (it is okay to use arrows when labeling a city if the area is too small to write in). You should always have a key, so people know what is what (example: if a triangle is used to label a mountain show what the triangle is used to label).
