GIS::Distance::Formula - Role for all the GIS::Distance::Formula:: classes.

This role enforces an API and provides shared information for the formula classes that use it.

Number of kilometers around the equator of the earth. Defaults to 6371.64.

Number of units in a single decimal degree (lat or lon) at the equator. The default, 0.0174532925199433, is derived from:

  $gis->distance( 10,0 => 11,0 )->km() / $gis->kilometer_rho()

Aran Clary Deltac <bluefeet@cpan.org>

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.