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TNMCorps Project Webpage

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

Our new editor:

 New to The National Map Corps? Start here!








Project Updates

2/4/19 ------------------------

January 2019 Newsletter → March 2019 Newsletter

A big welcome-back to all of our volunteers! Thank you for hanging in there with us through the recent shutdown!

We wanted to let our volunteers know that due to the shutdown, TNMCorps will not be releasing a January 2019 Newsletter. Be on the lookout for our next regularly-scheduled newsletter in March 2019.

Reach out to us at with questions and/or comments. Happy Mapping!

1/28/19 ------------------------

TNMCorps is back online!!

We're back!! We hope everyone had a Happy New Year! Thank you for your patience as we return from the government shutdown and work through the backlog. The web editor is up and running again, and we're eager to get back to editing! We hope you'll rejoin us in our mission to update and improve structures data for the nation.

Not sure where to start? Our Structure Finder is a handy tool that randomly selects a point for each user role.

Reach out to us at with questions and/or comments. Happy Mapping!

11/20/18 ------------------------

November 2018 Newsletter

Happy Thanksgiving! The November 2018 TNMCorps Newsletter is now available!

TNMCorps November Newsletter

Click Here to check out more Project Updates