01-May-2002 -- Professor and Geographer Paulo Roberto Fitz and Professor and Computer and Nautical Scientist Vinicius Gadis Ribeiro visited the confluence 30o S 51o W in May 1st 2002, at 11h23m04s GMT.
The point is located in Alvorada city - part of the called " Great Porto Alegre", capital of Rio Grande do Sul. The confluence 30o S51o W is nowadays in a matress factory in progress (Cantegril Matress), close to a road called RS-118.
Soon, we are sending the map to arive at this confluence and more photos - from all cardinal points of this confluence.