as the modern horse evolved from is ancestors due to changes in feeding habits, substantial changes
occurred in the shape of its teeth. what kind of change in feeding habit is reflected by these
modifications?

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