is this true or false, Surface waves result from a combination of up-and-down plus side-to-side motion.

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

Ithink you should go back and learn in school rather then here asking questions