Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Visual and Verbal Communication (hierarchy name)
4. Information Forms (hierarchy name)
5. information forms (objects)
6. document genres
7. [documents by form]
8. graphic document genres
9. cartographic materials
10. maps (documents)
11. [maps by subject type]
12. [maps by subject: location]
13. world maps

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Visual and Verbal Communication
4. Information Forms
5. information forms
6. document genres
7. documents by form
8. graphic document genres
9. cartographic materials
10. maps
11. maps by subject type
12. early maps

Anotations

Scope note:

Early diagramatic renderings of the known world. The first known form of these was the late 7th or early 8th century work of Isidore of Seville. The design consists of a ring of encircling sea-ocean divided in its interior into three continents for Asia, Europe, and Africa, understood as a capital letter T within an O. It is also known as an Isidoran map or a "T and O map" or "O–T map" or "T–O map."