Explain the nature of the relationship between the length of extremities ( such as limbs and ears) and climate.

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 best way to tell its true color is to look at the minerals streak