Ok it looks like you are referring to the campaign map of Silesia. We did add higher resolution printable maps to the book, on pages 74 (DM’s version) and 75 (Players version). This is in Version 1.49 of the book.
If those are not sufficient though I can make the higher resolution map available to you.
The original version of the map we used can be found here (at 2388 x 1970 pixels):