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 function]

Anotations

Scope note:

Maps, usually maintained in the public works or engineering departments of a city, showing information such as street and rail rights of way, location of bridges, and grade separations; used for planning and executing engineering work in a locality.