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: October 10, 2019

Mapping Challenge Update (10/10/19): City / Town Hall Structures in OH and WV

This challenge is coming along nicely with another 150 points added since our last update!

Date published: October 10, 2019

Mapping Challenge Update (10/10/19): Cemeteries in Calhoun, Jackson, and Kalamazoo Counties, MI

Here's the weekly update for this challenge.  Approximately 50 points have been edited since the last update.  Nice work!

Date published: October 10, 2019

Mapping Challenge Update (10/10/19): Schools in Wayne Co, MI

This challenge is close to being finished, but not quite yet! There are still several points that we need your help with!