Infer In most animals, an action potential will travel only in one direction along a neuron. Infer what the result might be in humans if nerve impulses could travel in both directions on a single neuron.

Long term continuous groundwater monitoring, especially with warning systems and anthropic activity monitors

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