For example, Water Rights maps and plans include many original manuscript maps. As these are usually produced at a very large scale, they often show details of roads, placement of buildings, etc. This is valuable information which may not be available elsewhere. Departmental Reference maps are also useful in this regard, depicting roads and trails at a medium scale. These folders have been created in response to frequent inquiries in the past.
Call numbers appear on the catalogue cards, finding aids and on the maps and plans themselves.
In 1979, all the old systems were closed and almost all of the material covered by the old call numbers was assigned new call numbers. A call number conversion list links the old call numbers to the new call numbers. These are the NW and NWp numbers used by the Library Unit. Such numbers were used for the atlases as well as for other published bound material about or containing maps. 3.2 - Finding Aids Finding aids which have the same CM number as the catalogue card provide general descriptions and item level lists.