Please help me
When analyzing tree rings, what do scientists assume a thin ring indicates?
A. a year that was warm or dry
A. a year that was warm or wet
A. a year that was cool or dry
A. a year that was wet or cool

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