This prokaryotic kingdom contains members who are not know to cause any disease

Are you asking about a street map usage  if so here is your answer  a street map for a very limited area could simply be a bit map or a .jpg image.  but a more general map would probably store the streets as vectors.  but you shouldn't assume that there is one way to do it

Idon’t understand do it say more wym

Take a guess, what do you think?

Ibelieve it is a)sort by color