There is a map based on the brazilians measurements. The system used for the measurements is the SIMET (http://simet.nic.br), made by NIC.br. The tests are made by end users and the location of the tests are based on the zip code provided by the users.
http://simet.nic.br/mapas/ (only in portuguese - english version in progress)
Regards,
Fabrício.