Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Visual and Verbal Communication (hierarchy name)
4. Visual Works (hierarchy name)
5. visual works (works)
6. [visual works by material or technique]
7. photographs
8. [photographs by technique]
9. [photographs by picture-taking technique]

Anotations

Scope note:

Photographs taken from beyond the earth's atmosphere. For photographs of the earth taken from aircraft, use "aerial photographs"; for photographs of celestial bodies or astronomical phenomena, use "astrophotographs."