Which of the following explains the events occurring when water boils?

Room temperature water, 25° C, is in liquid state. With an increased temperature, the water molecules within the container begin to break their hydrogen bonds, and releasing heat in an exothermic reaction. As water reaches 100° C sea level, its liquid state becomes vapor and is emitted as steam. It can be explained as well by as its boiling point illustrated here.

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