Board Thread:General Mod Discussion/@comment-28153737-20161231210535/@comment-26172435-20170101095702

There's a fixed correlation between map pixel coordinated and region file coordinates. You can use that to determine affected region files as soon as you get the new map. Based on a recent message from Mevans regarding the Rhudel, I think it's not unlikely that the map for the Rhudel (and other affected areas for PB31), is not finally determined. I'll just await the first version launch and as in most cases it can take a few weeks and several version updates, I guess there will be enough time for server region resets before a bug-free version is available for servers.

Here's a tool you may find useful: https://dinnerbone.com/minecraft/tools/coordinates/