Which of the following tasks does a forensic scientist not have?
a)analyzing evidence

b)giving expert testimony

c)signing search warrants

d)training officers in how to collect evidence

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