Micro arthropod is (a) Scabies mite

(b) spirogyra

(c) Amoeba

(d) Yeast​

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

The answer to your question is vagina