Urban sprawl covers land once used for food production and destroys ecosystems.
a. true
b. false
by the united states census bureau standards, a population of 1,000 people defines an urban area.
a. true
b. false

It is true that Urban sprawl covers land once used for food production and destroys ecosystems. Many of the large cities that have come up were once fertile lands for irrigation or were big jungles. These jungles were cut down or the fertile lands destroyed to build cities and industries.
By the United States Census Bureau standards, a population of 1000 people define an urban area is completely false statement. As per the United States Census Bureau, more than 50000 people define an urban area.

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