You just took a tumble and your arm really hurts. you are wishing your brain would release a lot of to relieve the pain.

Endorphins help relieve pain.

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