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Map Layer Info

Index to Topographic Maps - 1:100,000 Scale
What this map layer shows: The positions of the intermediate-scale topographic maps that cover the conterminous United States and Hawaii.
Background Information
Sample Map The U.S. Geological Survey (USGS) produces topographic maps of the United States at a variety of scales. The USGS no longer updates this national series of 1:100,000-scale topographic maps. The intermediate-scale USGS topographic maps at 1:100,000 scale were used for land management and planning. These maps included natural features, such as mountains, valleys, plains, lakes, rivers, and vegetation. Contours in meters were used to show elevation. Also included were constructed features: roads, railroads, boundaries, transmission lines, and major buildings. The standard map size is 30 minutes of latitude by 60 minutes of longitude. The Index to Topographic Maps - 1:100,000 Scale map layer shows the positions of the intermediate-scale topographic maps that cover the conterminous United States and Hawaii. All USGS historical topographic maps have been scanned and are available online at no cost.
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Index to Topographic Maps - 1:100,000 Scale

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The National Map


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