How do you solve a punnett square use all the steps

1. Determine the genotypes of the parent organisms.

2. Write down your "cross" (mating)

3. draw a p-square.

4. "split" the letters of the genotypes for each parent and put them "outside" the p-square

5. determine the possible genotypes of the offspring by filling in the p-square.

6. Summarize results (genotypes and phenotypes of offspring)

7. bask in the glow of your accomplishment!

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