NAME

       GIS::Distance::Constants - Constants used by formula classes.

CONSTANTS

   $KILOMETER_RHO
       Number of kilometers around the equator of the earth.

       6371.64

   $DEG_RATIO
       Number of units in a single decimal degree (lat or lon) at the equator.

       0.0174532925199433

       This value is derived from:

           $gis = GIS::Distance->new( 'Haversine' );
           $DEG_RATIO = $gis->distance( 10,0 => 11,0 )->km() / $KILOMETER_RHO;

SUPPORT

       See "SUPPORT" in GIS::Distance.

AUTHORS

       See "AUTHORS" in GIS::Distance.

LICENSE

       See "LICENSE" in GIS::Distance.