GIS::Distance::Formula - Base class for all the GIS::Distance::Formula:: classes.
This class enforces an API and provides shared information for the formula classes that inherit from it. Don't use this module directly.
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()
This method is just a placeholder and throws an errors if called. The distance() method should be re-implemented by any class that extends this class.
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.
