When two different strains of bacteria are cultured together in the same petri dish, their populations are not as great as compared to when cultured alone. What type of interaction does this scenario represent?competition disease

predation

parasitism

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