Two strands of dna is produced during replication are copies of each other because each strand in double helix is a. identical b. complementary c. continuous d. connected

            The correct option is b (complementary).

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