Scientific knowledge is both long lasting and always . (2 points)
-non-observable
-changing
-permanent
-untestable

The awnser is b i believe

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