conceived by groupo ebx, the environmental protection project 'lagoa limpa' (clean lagoon) has made available several maps depicting the hidrography of lagoa rodrigo da freitas, the most popular lagoa among tourists in rio de janeiro.  

on the main page of the project it is possible to see lagoa's changes and urbanization from 1000 years ago to the present by sliding on a cursor under the main map.

this map shows the neighborhoods around lagoa,  this map shows the water depth/topography of the lagoa, this map shows basins and sub-basins of the lagoa,  this is a sewage map of the lagoa, this is a dredging map showing the sands in the lagoa, this map shows the rainwater tunnels around lagoa,  and finally this map shows lagoa before the changes of the xx century.