The National Map Corps


TNMCorps is an online crowdsourcing mapping project with volunteers successfully editing structures in all 50 States, Puerto Rico, and the U.S. Virgin Islands

Click here to go to the The National Map Corps Editor

As part of The National Map, structures include schools, hospitals, post offices, police stations, cemeteries, and other important public buildings. By updating and verifying structures data, volunteers are making significant contributions to USGS National Structures Database, The National Map, and ultimately U.S. Topo Maps!

Anyone with an interest in contributing can volunteer. It is easy to sign up and get started! All you need is access to the internet, an email address, and a willingness to learn. “How to” documentation including a comprehensive User Guide and a Quick Start Guide will have you up and editing quickly. Begin editing in your own hometown or anywhere in the U.S., Puerto Rico, and the U.S. Virgin Islands.

Volunteers earn virtual badges for participating and are recognized for their contributions (with permission) via USGS and National Map social media.

Follow us on Twitter @USGSTNM or #TNMCorps or LIKE us on Facebook!


Click here for TNMCorps Newsletters




Date published: December 5, 2019

Mapping Challenge Update (12/05/19): City / Town Hall Structures in MI

Michigan is coming along nicely with another 100 points added!

Date published: December 5, 2019

Mapping Challenge Update (12/05/19): City / Town Hall Structures in OH and WV

Here is the weekly update for this challenge.  West Virginia is nearing completion while Ohio is filling in nicely with more and more counties becoming populated!  However, there's still several villages yet to be added for Ohio.

Date published: November 27, 2019

TNMCorps Newsletter - November 2019

The National Map Corps November 2019 Newsletter (Vol. 5, Issue 5) is now available.