Is it possible to know where the nodes of the TestNet are located in the world?
First the site was online: http://r1.algorand.network:5001 where it was possible to see a map of the world and its nodes. Now it’s not online anymore. Is there something like this?
Thanks a lot
It’s online again - it was shut down as part of the testnet stall recovery effort and was just brought back online yesterday.
Yes, thanks.
However when I look for my node on the map, it appears online but the city does not appear written, but only the state.
Appears with: “None, State”.
For example -> “None, Italy”.
Could it be that because the environment is on Docker?
When I installed the node on Ubuntu, everything worked fine.
The location shown is provided by a 3rd party database (GeoIP Lite). Depending on the IP address that is identified when you connect to a Relay, it may resolve differently. It’s unrelated to running in Docker. Longer term we are looking at improvements to our dashboard, and a more reliable GeoIP lookup utility will be part of any such improvements.
Thank you for the interest and enthusiasm to investigate this - glad to have you here from wherever you are in Italy! 
how you retrive node list?
What do you mean? How do we do it? Or how can you do it? We do it through telemetry reporting from relays - reporting connections. The information is not available publicly at this time.