Great Crowns itself is 317 pages, that "gazetteer" has 306 pages, all at the same high quality as the book pages. Not only that, but nearly all of the fantastic quality colour photos in the gazetteer do not appear in "Crowns".
And it's free!
But let's put it this way, if they did a print copy of the gazetteer, we'd buy a copy.
Thanks for the link! I went looking for this when I first got the book & read that it was gonna be available, but I suspect it hadn't been posted then, so you've reminded me about it & saved me time finding it!