Decimal degrees to minute/seconds degrees

decimal_degree.rb

class DecimalDegree

  # logic from http://mathforum.org/sarah/hamilton/ham.degrees.html
  
  attr_accessor :decimal

  def initialize(decimal)
    @decimal = decimal.to_f
  end

  def convert_to_min_sec
    degrees = decimal.to_int
    minutes = ((decimal - degrees) * 60).abs
    seconds = ((minutes - minutes.to_int) * 60).abs.round(2)

    puts "#{degrees} #{minutes.to_int}\' #{seconds}\""
  end
end

if __FILE__ == $0
  DecimalDegree.new(ARGV.first).convert_to_min_sec
end

example

$ ruby decimal_degree.rb -27.116667
-27 7' 0"