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Entry Over 181,000 USGS Historic Topographic Maps

Entry Over 181,000 USGS Historic Topographic Maps

2024-02-18 08:12:21

In collaboration with the US Geological Survey (USGS), we lately up to date Esri’s on-line USGS historic topographic map assortment with over 1,745 new maps, bringing the whole variety of maps in our assortment to over 181,000 (181,008 to be precise). We additionally corrected quite a few maps that our customers reported as having georeferencing or different errors.

These maps are a part of the USGS Historical Topographic Map Collection (HTMC) which incorporates all of the historic topographic quadrangle maps (quads) that had been printed for the reason that USGS topographic mapping program was initiated in 1879. Extra about this beneath.

Esri’s USGS historic topographic map assortment accommodates historic quads (excluding orthophoto quads) relationship from 1884 to 2006 with scales starting from 1:10,000 to 1:250,000. The scanned maps can be utilized in ArcGIS Professional, ArcGIS On-line, and ArcGIS Enterprise. They may also be downloaded as georeferenced TIFs to be used in different functions.

We make it straightforward so that you can discover and obtain these maps, or shortly create an ArcGIS On-line map, utilizing our Historical Topo Map Explorer app. Initially launched in 2014, we lately up to date the app with a brand new look and new options, like overlaying the historic maps on a satellite tv for pc picture or 3D hillshade and including labels for present geographic options (determine 1). The app offers a visible interface to go looking and discover the historic maps by geographic extent, publication 12 months, and map scale. Be taught extra in regards to the app in this blog post by John Nelson and associates. It’s also possible to entry the app from ArcGIS on-line here.

ArcGIS Living Atlas Historical Topo Map Explorer app
ArcGIS Dwelling Atlas Historic Topo Map Explorer app

Determine 1. The lately up to date Historic Topo Map Explorer app helps you visually discover and entry over 181,000 historic scanned USGS topo maps, and you may add terrain, satellite tv for pc imagery, and labels to the show.

As talked about above, the historic maps in Esri’s assortment are a part of the USGS HTMC (click here to study extra). This assortment is the product of the USGS Historical Quadrangle Scanning Project which was launched in 2011 to offer a digital archive of the irreplaceable assortment of topographic maps within the USGS Reston Map Library. The HTMC contains all scales and all editions of the topographic maps revealed by the USGS from 1884, when “John Wesley Powell persuaded the U.S. Congress to authorize the U.S. Geological Survey (USGS) to start systematic topographic mapping of the US” (see this source) thus initiating the US topographic mapping program, and 2006, when “the ultimate maps created utilizing conventional cartographic strategies and lithographic printing processes have been revealed (see this source).”

Relating to the map scales, in accordance with the USGS:

The U.S. Geological Survey (USGS) publishes maps at numerous scales. The size used for many U.S. topographic mapping is 1:24,000. USGS maps at this scale cowl an space measuring 7.5 minutes of latitude and seven.5 minutes of longitude and are generally known as 7.5-minute quadrangle maps. Map protection for many of the United States has been accomplished at this scale, aside from Puerto Rico, which is mapped at 1:20,000 and 1:30,000, and for a number of States which have been mapped at 1:25,000. Most of Alaska has been mapped at 1:63,360, with some populated areas additionally mapped at 1:24,000 and 1:25,000.

Beforehand obtainable solely as printed lithographic copies, the historic maps have been scanned “as is” to create high-resolution pictures that seize the content material and situation of every map sheet. All maps have been georeferenced, and map metadata was captured as a part of the method.

For the Esri assortment, the scanned maps have been revealed as an ArcGIS Online image service that may be seen on the internet and permits customers to obtain particular person scanned pictures.

For maps that aren’t within the Esri assortment and maps after 2006, the USGS National Map Downloader app is the first portal for locating and downloading maps and different knowledge merchandise of the USGS Nationwide Geospatial Program. The topoView app offers a visible overview of the HTMC and serves maps in further codecs. It’s also possible to create on demand maps utilizing the topoBuilder app. To study extra about these USGS instruments and assets, click here.

To study extra in regards to the historical past of topographic mapping on the USGS, learn this ArcNews article and this USGS publication. To study extra in regards to the symbols used on historic USGS topo maps, click here.

Need to study extra about how you need to use these maps in your maps and initiatives? Listed below are a number of examples.

See Also

  • Bern Szukalski wrote this blog post explaining how you can use the topo maps within the Esri assortment as your ArcGIS On-line basemap.

Though the next weblog posts use the classic explorer app, you may simply use the up to date app to realize the identical outcomes.

  • I wrote this blog post about “Utilizing Historic USGS Topographic Maps in ArcGIS Professional”.
  • Take a look at this blog post from John Nelson about including a 3D impact to the scanned maps.
  • John additionally confirmed us how you can spotlight an space of curiosity on a historic topo quad in this blog post.

In regards to the creator

Dr. Aileen Buckley is a cartographer who’s been at Esri since 2003. She finds and shares finest practices for mapping and evaluation with ArcGIS, which leads her to publish broadly and current world-wide.

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