The USGS Historical Topographic Map Explorer application will be retired on June 21, 2024. It has been replaced by the new Historical Topo Map Explorer application, which is described in this blog.

You will not need to update bookmarks that you may currently use to access the application. Beginning June 22, 2024, the new application will be assigned the URL of the retiring application.

Please get in touch with us at topoexplorer@esri.com with your questions or comments.

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