What describes a cause of lithospheric plate movement across the surface of earth?

Yes he thought they should be left to chance why, because he thought that was the best thing to do

This post might have the info you need:

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