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From old maps to GPS tracks, we work with

geospatial data of all kinds.


Our clients range from

large institutions to

small not-for-profit initiatives.

Historic Mapping
Web Maps & Databases
Cartographic Services
Arches Support & Hosting

Historic Mapping

Map archive research  ◦  Historic map georeferencing and publishing  ◦  Report graphics and overlays

Arches Support & Hosting

Hosting  ◦  Implementation  ◦  Data ETL and Import/Export  ◦  v3 to v4 Migration    Support and Maintenance

We have been active participants in the Arches project since 2014. You can learn about some of our past Arches installations in Past Work, or view source code for all of this work in GitHub.


Web Maps & Databases

Interactive web maps to embed on your website  ◦  Database design and hosting  ◦  Publish your own data, or incorporate external mapping services


Cartographic Services

Static maps for brochures, events, and professional reports

map gallery​


Our Clients

coherit logo.png

Started in 2016, Legion GIS is a Louisiana-based consulting firm specializing in Geographic Information Systems. We work with clients and partners around the world, and are strong advocates for free and open source software, geospatial or otherwise.

​​Main Office

3038 Wyoming St.

Baton Rouge, LA 70802


Business Office

211 Hillyer St.

Viroqua, WI, 54665



About Us

Adam Cox - Owner/Developer

Adam has worked with geographic information systems since 2011. In his free time, he pores over old maps and goes exploring. | LinkedIn | Website

Liz Franklin - Office Manager

Liz has spent years in school and office administration, with a few side-trips into teaching English as a foreign language.

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