Carbon credits are used to . A. rehabilitate tropical rainforests
B. reduce the emission of volatile organic compounds (VOC's)
C. regulate how much carbon dioxide a country can emit
D. coordinate carbon sequestration activities

Ithink sanforcisco california (i am not 100% sure) if you feel the opposite so that lol

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