# File lib/jpmobile/datum_conv.rb, line 63
  def self.jgd2tky(b,l,he=0)
    x,y,z = blh2xyz(b,l,he,GRS80)
    x,y,z = xyz2xyz(x,y,z,ITRF94toTokyo97)
    b,l,he = xyz2blh(x,y,z,Bessel)
    return b,l,he
  end