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AGS Map Classification System

The AGS Map or Atlas call number is made up of the following parts:

    • The prefix (optional). Prefixes indicate form or location, and include RARE, VF (vertical file), OV (oversize).
    • The regional number, e.g.: 893 for Wisconsin
    • The regional number modifier:
      • -a Wall Maps (obsolete/not used).
      • -a/w Wall Maps (bulky or heavy unmounted)
      • -b Map sets or series.
      • -c Map of a part or section of geographic unit.
      • -d Map or plan of a city.
    • The amplification line (cutter by place) names the section (-c) or city (-d) depicted on the map.
    • Terminal line includes the AGS Classification Subject Divisions and the map situation and or publication date (or map scale for series)

*Maps in series or sets will often have the sheet number as the final line

Some Call Number Examples:
RARE
630
A-1745
A physical map of France from 1745 filed in the rare room.
630-b
G-1:250,000
A geological map series of France at scale 1:250,000.
630-c
.P37
C-1980
A population map of the Paris Region of France,from 1980.
630-d
.P37
B-1789
1995
An administrative map of Paris depicting Paris as it was in 1789. The map was published in 1995.