Question7 of 20 Which part of an electric motor transforms electrical energy intO mechanical
energy?
A. The rotating commutator
B. The turning electromagnet
C. The electric power source
D. The permanent magnets

The answer to that question is a

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