GeodesicWgs84 -- Distance calculations on the Earth's surface

This an implementation of the geodesic algorithms described in C. F. F. Karney "Algorithms for geodesics" ( https://dx.doi.org/10.1007/s00190-012-0578-z ). It uses the WGS84 standard as a reference ( http://en.wikipedia.org/wiki/World_Geodetic_System ).

Algorithms for the computation of geodesics on an ellipsoid of revolution are given. These provide accurate, robust, and fast solutions to the direct and inverse geodesic problems and they allow differential and integral properties of geodesics to be computed.

The files geodesic.c and geodesic.h make up for the real work and can be found at ( http://geographiclib.sourceforge.net/html/C/ ).

The version of this gem aims to follow the author's version.

Add this line to your application's Gemfile:

gem 'geodesic_wgs84'

And then execute:

$ bundle

Or install it yourself as:

$ gem install geodesic_wgs84

The representation of a DMS (degree minute second) format is 'dd.mm.ss,f' where f means tenth of seconds (fraction).

Also, we are working with 6 decimal places, which will render an accuracy of roughly 10cm. See ( http://en.wikipedia.org/wiki/Decimal_degrees#Accuracy )

require 'geodesic_wgs84'

wgs84 = Wgs84.new

wgs84.lat_lon ...

wgs84.lat_lon_dms ...

wgs84.lat_lon_dms_a (aligned) ...

wgs84.lat_lon_dms_z (zero-filled) ...

wgs84.distance ...

wgs84.average ...

wgs84.center ...

Tests are based on minitest.

rake test

1. Fork it ( https://github.com/volkerwiegand/geodesic_wgs84/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request