National Map

Trails and symbols are shown clearly. A comprehensive legend appears on each map. Since each map is unique, placement of the legend varies. 
The National Map small-scale collection, previously accessed through the National Atlas, offers plenty of choices in page-size maps.
The public may download digital aerial photography products at no cost from the Earth Resources Observation
A feature is something shown on a map, and it has characteristics or properties, which can be represented in feature-based Digital Line Graph (DLG) data using attributes and values.
Forest Visitor Maps are best used to view an entire National Forest. They are great for driving through or planning a trip to the forest, showing recreational sites, campgrounds, public information sites and other attractions in the forest.
Currently, some Forest Service units have elected not to participate in the USGS distribution program. The USGS hopes to carry all Forest Service maps in the future. 
A variant is any other name by which a feature is or was known. Such names can be historical or no longer used, or can be in use, but less widespread. Only one official feature name is allowed for Federal usage.
GNIS data is available from a number of sources and services.
Proposals to change the name of a natural feature may be submitted to the U.S. Board on Geographic Names as described below. However, there must be a compelling reason.
The elevation data in GNIS are not official.Only the geographic name and locative attributes are official.