MGRS (alpha-release)

Military Grid Referencing System (MGRS). The military grid reference system (MGRS) is the geocoordinate standard used by NATO militaries for locating points on the earth. The MGRS is derived from the Universal Transverse Mercator (UTM) grid system and the universal polar stereographic (UPS) grid system, but uses a different labeling convention. The MGRS is used for the entire earth. This allows you to use MGRS directly and easily convert between lat/long and grid based location data. You can specify how large of gid squares you want to use and is ideal for map overlaying, gid concentrations, or grid based computing. Grid sizes are availabe from 1m to 10km.


Add this line to your application's Gemfile:

gem 'mgrs'

And then execute:

$ bundle

Or install it yourself as:

$ gem install mgrs


TODO: Write usage instructions here


After checking out the repo, run bin/setup to install dependencies. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at[USERNAME]/mgrs.


The gem is available as open source under the terms of the MIT License.