The end of the fatty acid that does not attach to glycerol has what functional group

The fatty acid is a long organic acid. the acid part attaches to the glycerol, and the other end is CH3, methyl. Hope that helps !

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