Despite the title, and the appellations, many of these numbers were recorded in Chicago, which was a focal point for black musicians in the late twenties. By my reckoning, only twelve of the forty tracks emanated from New Orleans, although many of the others featured musicians who'd originated from the Crescent City. Which explains the inclusion of Bob Crosby's Bob Cats, because both drummer Ray Bauduc and guitarist Nappy Lamare were born there.
Not that the liner note will tell you any of that. For something styled as an "Encyclopedia of Hot Jazz" it couldn't be lighter on fact, despite running to 20 pages (cover included). instead it offers a photo on one page and a quote in outsized print on the facing page. The tracklists are confined to two pages, and show band, title, composer, and year of recording.
Subject to those reservations this is reasonable selection of recordings in the New Orleans style, if that's what you're after.