The medial lemniscus pathway gets its name from the location of the axons of:

I’m so sorry i don’t know the answer but i really need

The organism dies boomshakalaka

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