With the release of new US Topo maps for Illinois and South Dakota, the USGS has completed the second, three-year cycle of revising and updating electronic US Topo quadrangles. Since the project’s inception in late 2009, the USGS has updated nearly every map in the conterminous U.S. twice.
“The USGS and NGP are proud of our history and legacy of topographic mapping in the U.S.,” said Mike Tischler, director of the USGS National Geospatial Program. “This latest cycle of US Topo production is a testament to the professionalism and capability of our staff and keeps that legacy alive. We’ve revised more than 110,000 maps in the last six years to include higher quality data across the country, and have been able to deliver those maps in an easy to use format to suit the diverse needs of our users. While reaching the end of the second cycle is an important achievement, we look forward to the next cycle of US Topo production, and investigating emerging technologies to better serve the needs of the country.”
In the past year the production staff of the NGP has updated, revised and uploaded 18,767 US Topo quads covering 18 states, most recently for Illinois and South Dakota. Its staff created more than 635 new 1:24,000-scale maps for Alaska as part of the Alaska Mapping Initiative. All of the new US Topo maps are digital and offered for free download, as the USGS no longer prints topographic maps using traditional printing technologies.
Other improvements to the state maps in the second cycle include the inclusion of National Scenic Trails, “crowdsourced” trail data from the International Mountain Bike Association, increased parcel land data (PLSS) and trail data from the U.S. Forest Service.
The complete new map sets for Illinois and South Dakota join Maine, Alabama, Arizona, Nebraska, Nevada, Missouri, California, Louisiana, Mississippi, New Hampshire, Vermont, Connecticut, Massachusetts, Rhode Island, Wyoming and Florida as revised states for fiscal year 2015.
All of these new US Topo maps replace the first edition US Topo maps and are available for download from The National Map, the USGS Map Locator & Downloader website and several other USGS applications.
The first three-year production cycle ended in September 2012, and the second cycle ended in September 2015.
To compare change over time scans of legacy USGS topo maps, some dating back to the late 1800s, can be downloaded from the USGS Historical Topographic Map Collection.
