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.