and on this link, published by the fundação centro estadual de estatistica, pesquisa e formação de servidores publicos do rio de janeiro - ceperj, this map shows how the municipalities in rio de janeiro evolved since the year 1500 - the colored areas show the period of municipal creation, with the arrows showing which municipality was born from which.   this map shows the general distribution and concentration of free wi-fi spots across the city.

published by the instituto perreira passos - ipp, and by the the Rede Carioca de Rodas de Samba is a map showing all the 'rodas de samba' in metropolitan rio de janeiro via this link - choosing the day of the week will show circles on the map where to find samba, with the color red indicating a street event, the color orange indicating a free event, and a the color yellow indicating a paid event. Additionally, the map provides information of the artists and a variety of pictures and contact information.