1 file was damaged to my knowledge, that was the server.properties only, I will need conformation from other players that this was widespread and not just this one area.
When I logged on, I was in that nice new train station near spawn, that had a big map I was admiring, So I wouldn’t think it was every map.
There is nothing I can do about this, I presume map data is stored in the world file, The hosts backup system does not allow us to download or extract any data from these backups.
The only option would be to roll back the entire server 24 hours, previous.