How does subduction sea floor spreading theory of continental drift (plate tectonics) formation of mountains/volcanoes/trenches earthquakes change earth's lithosphere

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 process of photosynthesis