The database contains information about the topographic maps sold by USGS of the United States and its territories. The database was designed to help libraries keep an inventory of their holdings of USGS maps.
Libraries differ on how they separate the other maps.
Each table has been encoded with a Primary Key. This key tells the computer which column in the table should be used for putting it in order. Orthophoto and satellite maps may be found in their appropriate tables. Within each state list you will NOT find maps of overlapping states-these have been removed. The overlapping maps can only be found in the state tables, when that particular state comes first in the name.