The Cosmographia of Julius Honorius is a copy of a map (a table or a sphaera mundi) that the author - probably a teacher - utilized for his geography lessons; this was later published by one of his students on the basis of notes taken during lectures, making it among the rarest examples of excerptum discipuli in surviving Latin.

For the most part, the work is merely a list of names, but even this is rife with errors that may have been introduced through either poor transcription of the table or confusion. One frequently observes mistakes in the names of peoples and cities: some places are not attested elsewhere, while others appear in forms that are nearly unrecognizable. These problems are so frequent that it is hard to determine whether they represent defects in the text or pictorial and linguistic oddities that reflect the usage of the copyists or the author himself. The part dealing with rivers, on the other hand, is much more descriptive: this mentions not only their sources and mouths, but often their tributaries and path, as well.

The Cosmographia divides the world into four zones based on four oceans: the Eastern, the Western, the Northern, and the Southern. As for their orientation, it seems likely that Honorius utilized a type of world atlas that had the Eastern ocean turn towards the top, as evidenced by the fact that Asia Minor and Greece are included in the Northern Ocean. A non-Eratosthenic map of this sort suggests that Honorius was familiar with the geographical theories popular in Christian circles.  [A. Borgna; tr. C. L. Caterine].