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Map Layer Info

Index to Topographic Maps - 1:24,000 and Other Large Scales

What this map layer shows:

The positions of over 54,000 large-scale topographic maps.
opens the U.S. Geological Survey home page
Background Information
Sample map Sample Map
The U.S. Geological Survey produces large-scale topographic maps at a primary scale of 1:24,000. The new generation of digital USGS topographic maps is known as the US Topo and these are available on-line at no cost in georeferenced portable document format (GeoPDF).

These maps include natural features, such as mountains, valleys, plains, lakes, rivers, and vegetation. Contours are used to show elevation. Also included are constructed features: roads, railroads, boundaries, transmission lines, and buildings. The standard map size is 7.5 minutes of latitude by 7.5 minutes of longitude. Large-scale topographic maps are used for engineering, energy exploration, natural resource conservation, environmental management, public works design, commercial and residential planning, and outdoor activities, such as hiking, camping, and fishing.

The Index to Topographic Maps - 1:24,000 and Other Large Scales map layer shows the positions of the more than 54,000 large-scale topographic maps that cover the United States, Puerto Rico, and the U.S. Virgin Islands. In addition to the latest US Topo maps, all USGS historical topographic maps have been scanned and are available online at no cost.