"}],"short_description":"We recently updated our online USGS historical topographic map collection with over 1,745 new maps for a new total of over 181,000 maps.","flexible_content":[{"acf_fc_layout":"content","content":"In collaboration with the US Geological Survey (USGS), we recently updated Esri\u2019s online USGS historical topographic map collection with over 1,745 new maps, bringing the total number of maps in our collection to over 181,000 (181,008 to be exact). We also corrected a number of maps that our users reported as having georeferencing or other errors.<\/p>\n
These maps are part of the USGS Historical Topographic Map Collection<\/a> (HTMC) which includes all the historical topographic quadrangle maps (quads) that had been printed since the USGS was established<\/a> in 1879. More about this below.<\/p>\n Esri\u2019s USGS historical topographic map collection contains historical quads (excluding orthophoto quads) dating from 1879 to 2006 with scales ranging from 1:10,000 to 1:250,000. The scanned maps can be used in ArcGIS Pro, ArcGIS Online, and ArcGIS Enterprise. They can also be downloaded as georeferenced TIFs for use in these and other applications.<\/p>\n"},{"acf_fc_layout":"content","content":" We make it easy for you to explore and download these maps, or quickly create an ArcGIS Online map, using our Historical Topo Map Explorer app<\/a>. Originally launched in 2014, we recently updated the app with a new look and new features, like overlaying the historical maps on a satellite image or 3D hillshade and adding labels for current geographic features (figure 1). The app provides a visual interface to search and explore the historical maps by geographic extent, publication year, and map scale. Learn more about the app in this blog post<\/a> by John Nelson and friends. You can also access the app from ArcGIS online here<\/a>.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":2246902,"id":2246902,"title":"ExplorerApp_Image","filename":"ExplorerApp_Image.jpg","filesize":95764,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/02\/ExplorerApp_Image.jpg","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-living-atlas\/mapping\/access-over-181000-usgs-historical-topographic-maps\/explorerapp_image","alt":"ArcGIS Living Atlas Historical Topo Map Explorer app","author":"4331","description":"ArcGIS Living Atlas Historical Topo Map Explorer app","caption":"ArcGIS Living Atlas Historical Topo Map Explorer app","name":"explorerapp_image","status":"inherit","uploaded_to":2243362,"date":"2024-02-16 20:20:01","modified":"2024-02-16 20:20:13","menu_order":0,"mime_type":"image\/jpeg","type":"image","subtype":"jpeg","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":824,"height":464,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/02\/ExplorerApp_Image-213x200.jpg","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/02\/ExplorerApp_Image.jpg","medium-width":464,"medium-height":261,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/02\/ExplorerApp_Image.jpg","medium_large-width":768,"medium_large-height":432,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/02\/ExplorerApp_Image.jpg","large-width":824,"large-height":464,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/02\/ExplorerApp_Image.jpg","1536x1536-width":824,"1536x1536-height":464,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/02\/ExplorerApp_Image.jpg","2048x2048-width":824,"2048x2048-height":464,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/02\/ExplorerApp_Image.jpg","card_image-width":824,"card_image-height":464,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/02\/ExplorerApp_Image.jpg","wide_image-width":824,"wide_image-height":464}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":" Figure 1. The recently updated Historical Topo Map Explorer app helps you visually explore and access over 181,000 historical scanned USGS topo maps, and you can add terrain, satellite imagery, and labels to the display.<\/em><\/p>\n"},{"acf_fc_layout":"content","content":" As mentioned above, the historical maps in Esri\u2019s collection are part of the USGS HTMC<\/a>. This collection is the product of the USGS Historical Quadrangle Scanning Project<\/a> which was launched in 2011 to provide a digital archive of the irreplaceable collection of topographic maps in the USGS Reston Map Library. The HTMC includes all scales and all editions of the topographic maps published by the USGS from 1879 and 2006, when \u201cthe final maps<\/a> created using traditional cartographic methods and lithographic printing processes were published and subsequent maps were published online\u201d Although the \u201cJohn Wesley Powell persuaded the U.S. Congress to authorize the U.S. Geological Survey (USGS) to begin systematic topographic mapping of the United States\u201d in 1884<\/a>, he long advocated topographic mapping as part of geologic and natural resources mapping. And since Powell was appointed by President James Garfield to serve as the second director of the U.S. Geological Survey (founded in 1879) from 1881 to 1894, it is entirely possible to find topographic maps for the United States that are dated prior to 1884, especially if the survey for the map was completed prior to Powell’s appointment. In fact, the 1:62,500 map of Cravens, AR, in the Esri collection is dated 1879. Although Powell is referenced on the map as the USGS Director, the topography was surveyed by the Geological Survey of Arkansas<\/a>, which was formed 22 years earlier in 1857. So, the USGS probably used the 1879 data from the Geological Survey of Arkansas to compile their map.<\/p>\n Regarding the map scales, according to the USGS<\/a>:<\/p>\n The U.S. Geological Survey (USGS) publishes maps at various scales. The scale used for most U.S. topographic mapping is 1:24,000. USGS maps at this scale cover an area measuring 7.5 minutes of latitude and 7.5 minutes of longitude and are commonly called 7.5-minute quadrangle maps. Map coverage for most of the United States has been completed at this scale, except for Puerto Rico, which is mapped at 1:20,000 and 1:30,000, and for a few States that have been mapped at 1:25,000. Most of Alaska has been mapped at 1:63,360, with some populated areas also mapped at 1:24,000 and 1:25,000.<\/em><\/p>\n Previously available only as printed lithographic copies, the historical maps were scanned \u201cas is\u201d to create high-resolution images that capture the content and condition of each map sheet. All maps were georeferenced, and map metadata was captured as part of the process.<\/p>\n For the Esri collection, the scanned maps were published as an ArcGIS Online image service<\/a> that can be viewed on the web and allows users to download individual scanned images.<\/p>\n For maps that are not in the Esri collection and 1:24,000-scale maps after 2006, the USGS National Map Downloader app<\/a> is the primary portal for finding and downloading maps and other data products of the USGS National Geospatial Program. The topoView app<\/a> provides a visual overview of the HTMC and serves maps in additional formats. You can also create on demand maps using the topoBuilder app<\/a>. This app has been able to produce 1:24,000-scale maps since it was launched, but in February 2024, USGS announced that it can also produce 1:100,000-scale quads. To learn more about these USGS tools and resources, click here<\/a>.<\/p>\n To learn more about the history of topographic mapping at the USGS, read this ArcNews<\/em> article<\/a> and this USGS publication<\/a>. To learn more about the symbols used on historical USGS topo maps, click here<\/a>.<\/p>\n"},{"acf_fc_layout":"content","content":" Want to learn more about how you can use these maps in your maps and projects? Here are a few examples.<\/p>\n"},{"acf_fc_layout":"content","content":" Although the following blog posts use the vintage explorer app, you can easily use the updated app to achieve the same results.<\/p>\n"},{"acf_fc_layout":"content","content":"The Historical Topo Map Explorer App<\/h1>\n"},{"acf_fc_layout":"content","content":"
More about the USGS Historical Topographic Map Collection<\/h1>\n"},{"acf_fc_layout":"content","content":"
Using the Historical Maps in Your Work<\/h1>\n"},{"acf_fc_layout":"content","content":"
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