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*'''Railroad maps''' indicate preferred routes of travel during an era where the routes changed from one year to the next. These also aid in tracking the possible whereabouts of railroad employees since many railroads merged or changed names. | *'''Railroad maps''' indicate preferred routes of travel during an era where the routes changed from one year to the next. These also aid in tracking the possible whereabouts of railroad employees since many railroads merged or changed names. | ||
=== Atlases === | == Types and location of various map types == | ||
=== Atlases === | |||
An atlas is a bound collection of maps. It often contains historical and geographical information for a county or state. Collections of maps and atlases are available at numerous libraries and historical societies. Many county atlases that show the names of landowners and are usually based on county plat maps (see the "[[United States Land and Property|Land and Property]]") have been published. | An atlas is a bound collection of maps. It often contains historical and geographical information for a county or state. Collections of maps and atlases are available at numerous libraries and historical societies. Many county atlases that show the names of landowners and are usually based on county plat maps (see the "[[United States Land and Property|Land and Property]]") have been published. | ||