# File lib/jpmobile/datum_conv.rb, line 55
  def self.tky2jgd(b,l,he=0)
    x,y,z = blh2xyz(b,l,he,Bessel)
    x,y,z = xyz2xyz(x,y,z,Tokyo97toITRF94)
    b,l,he = xyz2blh(x,y,z,GRS80)
    return b,l,he
  end