If you purchased Portal of a Thousand Worlds in any form of e-book you will receive within a few days a notice of a corrected free download, which will include the map that was accidentally omitted.
If you bought a paper copy, that correction isn't possible. However, the map of the Good Land has now been added to the Maps page of this website. If you right-clink on the map you want and then left-click on "copy Image", you can post it to any file you want and print it out.
It's not a perfect solution, but it is the best we could manage.