Class: GeoDistance::Spherical

Inherits:
DistanceFormula show all
Defined in:
lib/geo-distance/spherical.rb

Class Method Summary collapse

Methods inherited from DistanceFormula

#initialize

Constructor Details

This class inherits a constructor from GeoDistance::DistanceFormula

Class Method Details

.distance(lat1, lon1, lat2, lon2) ⇒ Object 



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# File 'lib/geo-distance/spherical.rb', line 6

def self.distance( lat1, lon1, lat2, lon2) 
  from_longitude  = lon1.to_radians
  from_latitude   = lat1.to_radians
  to_longitude    = lon2.to_radians
  to_latitude     = lat2.to_radians

  c = Math.acos(
      Math.sin(from_latitude) *
      Math.sin(to_latitude) +

      Math.cos(from_latitude) * 
      Math.cos(to_latitude) *
      Math.cos(to_longitude - from_longitude)
  ) #* EARTH_RADIUS[units.to_sym]
  
  GeoDistance::Distance.new c
end