Which of the following best defines weather?

Weather, as a noun, is defined as a tangible idea when using an assessment of the environment. Factors used for the assessment include temperature, barometric pressure, and wind chill. Weather, as a verb, is defined as the action of surviving a difficult situation. Another definition of the verb is wearing away or breaking down an object.

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