For the current members there has been mutually agreed regions allocated. The above map shows the areas relative to each other, but a more illustrative version is below. There is a link to a high-resolution version that is scaled at 1 pixel per block.

Here is a link to the high-resolution version:

URL: https://belethia.com/stuff/belethia-map-hires.png

The intersecting point of the two white lines is X:0 Z:0 just for reference. Please bear in mind the terrain may well be different to the maps, but the areas are pretty accurate. Should anything change, these maps will be updated.