published by rio service tour, this is a great map of botafogo,  flamengo and laranjeiras, accessible on this link. 

published by rio service tour, this is a great map of barra da tijuca, accessible on this link.  published by the project lagoa limpa, the webpage on this link shows a cool animation of how the lagoon evolved during the last 1000 years, and clearly shows ipanema beach right across from it, the statue of christ on corcovado, the sugar loaf in the far back, and the hippodrome in gávea.